firefly-linux-kernel-4.4.55.git
14 years agocfq-iosched: no dispatch limit for single queue
Shaohua Li [Thu, 3 Dec 2009 11:58:05 +0000 (12:58 +0100)]
cfq-iosched: no dispatch limit for single queue

Since commit 2f5cb7381b737e24c8046fd4aeab571fb71315f5, each queue can send
up to 4 * 4 requests if only one queue exists. I wonder why we have such limit.
Device supports tag can send more requests. For example, AHCI can send 31
requests. Test (direct aio randread) shows the limits reduce about 4% disk
thoughput.
On the other hand, since we send one request one time, if other queue
pop when current is sending more than cfq_quantum requests, current queue will
stop send requests soon after one request, so sounds there is no big latency.

Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
14 years agoblock: Allow devices to indicate whether discarded blocks are zeroed
Martin K. Petersen [Thu, 3 Dec 2009 08:24:48 +0000 (09:24 +0100)]
block: Allow devices to indicate whether discarded blocks are zeroed

The discard ioctl is used by mkfs utilities to clear a block device
prior to putting metadata down.  However, not all devices return zeroed
blocks after a discard.  Some drives return stale data, potentially
containing old superblocks.  It is therefore important to know whether
discarded blocks are properly zeroed.

Both ATA and SCSI drives have configuration bits that indicate whether
zeroes are returned after a discard operation.  Implement a block level
interface that allows this information to be bubbled up the stack and
queried via a new block device ioctl.

Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
14 years agoRevert "cfq: Make use of service count to estimate the rb_key offset"
Jens Axboe [Mon, 30 Nov 2009 08:38:13 +0000 (09:38 +0100)]
Revert "cfq: Make use of service count to estimate the rb_key offset"

This reverts commit 3586e917f2c7df769d173c4ec99554cb40a911e5.

Corrado Zoccolo <czoccolo@gmail.com> correctly points out, that we need
consistency of rb_key offset across groups. This means we cannot properly
use the per-service_tree service count. Revert this change.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
14 years agocfq-iosched: fix corner cases in idling logic
Corrado Zoccolo [Thu, 26 Nov 2009 09:02:58 +0000 (10:02 +0100)]
cfq-iosched: fix corner cases in idling logic

Idling logic was disabled in some corner cases, leading to unfair share
 for noidle queues.
 * the idle timer was not armed if there were other requests in the
   driver. unfortunately, those requests could come from other workloads,
   or queues for which we don't enable idling. So we will check only
   pending requests from the active queue
 * rq_noidle check on no-idle queue could disable the end of tree idle if
   the last completed request was rq_noidle. Now, we will disable that
   idle only if all the queues served in the no-idle tree had rq_noidle
   requests.

Reported-by: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Corrado Zoccolo <czoccolo@gmail.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
14 years agocfq-iosched: idling on deep seeky sync queues
Corrado Zoccolo [Thu, 26 Nov 2009 09:02:58 +0000 (10:02 +0100)]
cfq-iosched: idling on deep seeky sync queues

Seeky sync queues with large depth can gain unfairly big share of disk
 time, at the expense of other seeky queues. This patch ensures that
 idling will be enabled for queues with I/O depth at least 4, and small
 think time. The decision to enable idling is sticky, until an idle
 window times out without seeing a new request.

The reasoning behind the decision is that, if an application is using
large I/O depth, it is already optimized to make full utilization of
the hardware, and therefore we reserve a slice of exclusive use for it.

Reported-by: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Corrado Zoccolo <czoccolo@gmail.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
14 years agocfq-iosched: fix no-idle preemption logic
Corrado Zoccolo [Thu, 26 Nov 2009 09:02:58 +0000 (10:02 +0100)]
cfq-iosched: fix no-idle preemption logic

An incoming no-idle queue should preempt the active no-idle queue
 only if the active queue is idling due to service tree empty.
 Previous code was buggy in two ways:
 * it relied on service_tree field to be set on the active queue, while
   it is not set when the code is idling for a new request
 * it didn't check for the service tree empty condition, so could lead to
   LIFO behaviour if multiple queues with depth > 1 were preempting each
   other on an non-NCQ device.

Reported-by: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Corrado Zoccolo <czoccolo@gmail.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
14 years agocfq-iosched: fix ncq detection code
Corrado Zoccolo [Thu, 26 Nov 2009 09:02:57 +0000 (10:02 +0100)]
cfq-iosched: fix ncq detection code

CFQ's detection of queueing devices initially assumes a queuing device
and detects if the queue depth reaches a certain threshold.
However, it will reconsider this choice periodically.

Unfortunately, if device is considered not queuing, CFQ will force a
unit queue depth for some workloads, thus defeating the detection logic.
This leads to poor performance on queuing hardware,
since the idle window remains enabled.

Given this premise, switching to hw_tag = 0 after we have proved at
least once that the device is NCQ capable is not a good choice.

The new detection code starts in an indeterminate state, in which CFQ behaves
as if hw_tag = 1, and then, if for a long observation period we never saw
large depth, we switch to hw_tag = 0, otherwise we stick to hw_tag = 1,
without reconsidering it again.

Signed-off-by: Corrado Zoccolo <czoccolo@gmail.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
14 years agoMerge branch 'for-jens' of git://git.drbd.org/linux-2.6-drbd into for-2.6.33
Jens Axboe [Thu, 26 Nov 2009 08:46:51 +0000 (09:46 +0100)]
Merge branch 'for-jens' of git://git.drbd.org/linux-2.6-drbd into for-2.6.33

14 years agoFix regression in direct writes performance due to WRITE_ODIRECT flag removal
Vivek Goyal [Thu, 26 Nov 2009 08:45:40 +0000 (09:45 +0100)]
Fix regression in direct writes performance due to WRITE_ODIRECT flag removal

There seems to be a regression in direct write path due to following
commit in for-2.6.33 branch of block tree.

commit 1af60fbd759d31f565552fea315c2033947cfbe6
Author: Jeff Moyer <jmoyer@redhat.com>
Date:   Fri Oct 2 18:56:53 2009 -0400

    block: get rid of the WRITE_ODIRECT flag

Marking direct writes as WRITE_SYNC_PLUG instead of WRITE_ODIRECT, sets
the NOIDLE flag in bio and hence in request. This tells CFQ to not expect
more request from the queue and not idle on it (despite the fact that
queue's think time is less and it is not seeky).

So direct writers lose big time when competing with sequential readers.

Using fio, I have run one direct writer and two sequential readers and
following are the results with 2.6.32-rc7 kernel and with for-2.6.33
branch.

Test
====
1 direct writer and 2 sequential reader running simultaneously.

[global]
directory=/mnt/sdc/fio/
runtime=10

[seqwrite]
rw=write
size=4G
direct=1

[seqread]
rw=read
size=2G
numjobs=2

2.6.32-rc7
==========
direct writes: aggrb=2,968KB/s
readers      : aggrb=101MB/s

for-2.6.33 branch
=================
direct write: aggrb=19KB/s
readers       aggrb=137MB/s

This patch brings back the WRITE_ODIRECT flag, with the difference that we
don't set the BIO_RW_UNPLUG flag so that device is not unplugged after
submission of request and an explicit unplug from submitter is required.

That way we fix the jeff's issue of not enough merging taking place in aio
path as well as make sure direct writes get their fair share.

After the fix
=============
for-2.6.33 + fix
----------------
direct writes: aggrb=2,728KB/s
reads: aggrb=103MB/s

Thanks
Vivek

Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
14 years agocfq-iosched: cleanup unreachable code
Corrado Zoccolo [Thu, 26 Nov 2009 08:41:21 +0000 (09:41 +0100)]
cfq-iosched: cleanup unreachable code

cfq_should_idle returns false for no-idle queues that are not the last,
so the control flow will never reach the removed code in a state that
satisfies the if condition.
The unreachable code was added to emulate previous cfq behaviour for
non-NCQ rotational devices. My tests show that even without it, the
performances and fairness are comparable with previous cfq, thanks to
the fact that all seeky queues are grouped together, and that we idle at
the end of the tree.

Signed-off-by: Corrado Zoccolo <czoccolo@gmail.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
14 years agoblock: add helpers to run flush_dcache_page() against a bio and a request's pages
Ilya Loginov [Thu, 26 Nov 2009 08:16:19 +0000 (09:16 +0100)]
block: add helpers to run flush_dcache_page() against a bio and a request's pages

Mtdblock driver doesn't call flush_dcache_page for pages in request.  So,
this causes problems on architectures where the icache doesn't fill from
the dcache or with dcache aliases.  The patch fixes this.

The ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE symbol was introduced to avoid
pointless empty cache-thrashing loops on architectures for which
flush_dcache_page() is a no-op.  Every architecture was provided with this
flush pages on architectires where ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE is
equal 1 or do nothing otherwise.

See "fix mtd_blkdevs problem with caches on some architectures" discussion
on LKML for more information.

Signed-off-by: Ilya Loginov <isloginov@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Peter Horton <phorton@bitbox.co.uk>
Cc: "Ed L. Cashin" <ecashin@coraid.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
14 years agocfq: Make use of service count to estimate the rb_key offset
Gui Jianfeng [Thu, 26 Nov 2009 08:14:11 +0000 (09:14 +0100)]
cfq: Make use of service count to estimate the rb_key offset

For the moment, different workload cfq queues are put into different
service trees. But CFQ still uses "busy_queues" to estimate rb_key
offset when inserting a cfq queue into a service tree. I think this
isn't appropriate, and it should make use of service tree count to do
this estimation. This patch is for for-2.6.33 branch.

Signed-off-by: Gui Jianfeng <guijianfeng@cn.fujitsu.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
14 years agodrbd: moved CN_IDX_DRBD and CN_VAL_DRBD to the right file
Philipp Reisner [Wed, 25 Nov 2009 16:50:00 +0000 (17:50 +0100)]
drbd: moved CN_IDX_DRBD and CN_VAL_DRBD to the right file

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
14 years agoDRBD: Now the code is 8.3.6 + 3 fixes (without compat crap)
Philipp Reisner [Wed, 18 Nov 2009 14:52:51 +0000 (15:52 +0100)]
DRBD: Now the code is 8.3.6 + 3 fixes (without compat crap)

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
14 years agoFixed a regression in resync decission code drbd_uuid_compare() [Bugz 260]
Philipp Reisner [Wed, 18 Nov 2009 14:52:51 +0000 (15:52 +0100)]
Fixed a regression in resync decission code drbd_uuid_compare() [Bugz 260]

Since 8.3.3 we fail to do the resync when a partial resynch is not
possible, but a full synch is necessary.

This regression was introduced with 7101539930c0a89146959e7a39c09ad9c3516434

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
14 years agoadd missing state change on corrupt packet header in drbd_recv_header
Lars Ellenberg [Mon, 16 Nov 2009 14:58:04 +0000 (15:58 +0100)]
add missing state change on corrupt packet header in drbd_recv_header

Otherwise the 'state fixup' in the receiver will change to Unconnected,
but the receiver will terminate itself, and any attempt at 'down'ing
that drbd later will block forever.

see also Bugz. #259

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
14 years agofix in-kernel configuration serialization
Lars Ellenberg [Mon, 16 Nov 2009 14:48:54 +0000 (15:48 +0100)]
fix in-kernel configuration serialization

this is uncritical, as we still also serialize in userland,
but to correctly serialize on the CONFIG_PENDING bit,
it must be wait_event(state_wait, \!test_and_set_bit)

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
15 years agocciss: change Cmd_sg_list.sg_chain_dma type to dma_addr_t
Alex Chiang [Mon, 23 Nov 2009 08:35:06 +0000 (09:35 +0100)]
cciss: change Cmd_sg_list.sg_chain_dma type to dma_addr_t

A recent commit broke the ia64 build:

Author: Don Brace <brace@beardog.cce.hp.com>
Date:   Thu Nov 12 12:50:01 2009 -0600

cciss: Add enhanced scatter-gather support.

because of this hunk:

--- a/drivers/block/cciss.h
+++ b/drivers/block/cciss.h
+struct Cmd_sg_list {
+       SGDescriptor_struct     *sgchain;
+       dma64_addr_t            sg_chain_dma;
+       int                     chain_block_size;
+};

The issue is that dma64_addr_t isn't #define'd on ia64.

The way that we're using Cmd_sg_list.sg_chain_dma is to hold an
address returned from pci_map_single().

+               temp64.val = pci_map_single(h->pdev,
+                                 h->cmd_sg_list[c->cmdindex]->sgchain,
+                                 len, dir);
+
+               h->cmd_sg_list[c->cmdindex]->sg_chain_dma = temp64.val;

pci_map_single() returns a dma_addr_t too.

This code will still work even on a 32-bit x86 build, where
dma_addr_t is defined to be a u32 because it will simply be
promoted to the __u64 that temp64.val is defined as.

Thus, declaring Cmd_sg_list.sg_chain_dma as dma_addr_t is safe.

Cc: Don Brace <brace@beardog.cce.hp.com>
Cc: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Alex Chiang <achiang@hp.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
15 years agocciss: fix scatter gather cleanup problems
Stephen M. Cameron [Mon, 23 Nov 2009 08:31:48 +0000 (09:31 +0100)]
cciss: fix scatter gather cleanup problems

On driver unload, only free up the extra scatter gather data if they were
allocated in the first place (the controller supports it) and don't forget
to free up the sg_cmd_list array of pointers.

Signed-off-by: Don Brace <brace@beardog.cce.hp.com>
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
15 years agopartitions: read whole sector with EFI GPT header
Karel Zak [Mon, 23 Nov 2009 08:29:58 +0000 (09:29 +0100)]
partitions: read whole sector with EFI GPT header

The size of EFI GPT header is not static, but whole sector is
allocated for the header. The HeaderSize field must be greater
than 92 (= sizeof(struct gpt_header) and must be less than or
equal to the logical block size.

It means we have to read whole sector with the header, because the
header crc32 checksum is calculated according to HeaderSize.

For more details see UEFI standard (version 2.3, May 2009):
  - 5.3.1 GUID Format overview, page 93
  - Table 13. GUID Partition Table Header, page 96

Signed-off-by: Karel Zak <kzak@redhat.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
15 years agopartitions: use sector size for EFI GPT
Karel Zak [Mon, 23 Nov 2009 08:29:13 +0000 (09:29 +0100)]
partitions: use sector size for EFI GPT

Currently, kernel uses strictly 512-byte sectors for EFI GPT parsing.
That's wrong.

UEFI standard (version 2.3, May 2009, 5.3.1 GUID Format overview, page
95) defines that LBA is always based on the logical block size. It
means bdev_logical_block_size() (aka BLKSSZGET) for Linux.

This patch removes static sector size from EFI GPT parser.

The problem is reproducible with the latest GNU Parted:

 # modprobe scsi_debug dev_size_mb=50 sector_size=4096

  # ./parted /dev/sdb print
  Model: Linux scsi_debug (scsi)
  Disk /dev/sdb: 52.4MB
  Sector size (logical/physical): 4096B/4096B
  Partition Table: gpt

  Number  Start   End     Size    File system  Name     Flags
   1      24.6kB  3002kB  2978kB               primary
   2      3002kB  6001kB  2998kB               primary
   3      6001kB  9003kB  3002kB               primary

  # blockdev --rereadpt /dev/sdb
  # dmesg | tail -1
   sdb: unknown partition table      <---- !!!

with this patch:

  # blockdev --rereadpt /dev/sdb
  # dmesg | tail -1
   sdb: sdb1 sdb2 sdb3

Signed-off-by: Karel Zak <kzak@redhat.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
15 years agocciss: Fix weird usage of ENXIO in cciss_scsi.c
Stephen M. Cameron [Thu, 12 Nov 2009 18:50:06 +0000 (12:50 -0600)]
cciss: Fix weird usage of ENXIO in cciss_scsi.c

cciss: Fix weird usage of ENXIO in cciss_scsi.c

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
15 years agocciss: Add enhanced scatter-gather support.
Don Brace [Thu, 12 Nov 2009 18:50:01 +0000 (12:50 -0600)]
cciss: Add enhanced scatter-gather support.

cciss: Add enhanced scatter-gather support.  For controllers which
supported, more than 512 scatter-gather elements per command may
be used, and the max transfer size can be increased to 8192 blocks.

Signed-off-by: Don Brace <brace@beardog.cce.hp.com>
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
15 years agocciss: Do not automatically rescan on UNIT ATTENTION/LUN DATA CHANGED
Stephen M. Cameron [Thu, 12 Nov 2009 18:49:55 +0000 (12:49 -0600)]
cciss: Do not automatically rescan on UNIT ATTENTION/LUN DATA CHANGED

cciss: Do not automatically rescan on UNIT ATTENTION/LUN DATA CHANGED
There are problems with doing this.  If, say, several logical drives
are deleted at once, several such UNIT ATTENTIONS will be encountered,
often during the rescan triggered by the first such UNIT ATTENTION.
The block layer may be in the midst of trying to add logical drives
which were just deleted (resulting in the subsequent UNIT ATTENTION(s).)
Making the rescan code robust enough to tolerate this kind of thing
is too complicated for the moment.  So, for now, we just don't do it.
Note: This UNIT ATTENTION/LUN DATA CHANGED situation only occurs on
the MSA2012.

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
15 years agocciss: Remove unnecessary check in scan_thread
Stephen M. Cameron [Thu, 12 Nov 2009 18:49:50 +0000 (12:49 -0600)]
cciss: Remove unnecessary check in scan_thread

cciss: Remove unnecessary check in scan_thread

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
15 years agocciss: fix typo that causes scsi status to be lost.
Stephen M. Cameron [Thu, 12 Nov 2009 18:49:45 +0000 (12:49 -0600)]
cciss: fix typo that causes scsi status to be lost.

cciss: fix typo that causes scsi status to be lost.

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
15 years agocciss: remove sendcmd() as it is no longer used.
Stephen M. Cameron [Thu, 12 Nov 2009 18:49:40 +0000 (12:49 -0600)]
cciss: remove sendcmd() as it is no longer used.

cciss: remove sendcmd() as it is no longer used.

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
15 years agocciss: clean up code in cciss_shutdown
Stephen M. Cameron [Thu, 12 Nov 2009 18:49:35 +0000 (12:49 -0600)]
cciss: clean up code in cciss_shutdown

cciss: clean up code in cciss_shutdown.  Send the flush cache
command down with interrupts still enabled, and do not do DMA
from the stack.

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
15 years agocciss: Remove the "withirq" parameter from various functions where possible
Stephen M. Cameron [Thu, 12 Nov 2009 18:49:30 +0000 (12:49 -0600)]
cciss: Remove the "withirq" parameter from various functions where possible

cciss:  Remove the "withirq" parameter from various functions where possible

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
15 years agocciss: Retry driver initiated cmds with unit attention condition
Stephen M. Cameron [Thu, 12 Nov 2009 18:49:25 +0000 (12:49 -0600)]
cciss: Retry driver initiated cmds with unit attention condition

cciss:  Retry driver initiated cmds with unit attention condition

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
15 years agocciss: Fix problem with remove_from_scan_list on driver unload
Stephen M. Cameron [Thu, 12 Nov 2009 18:49:19 +0000 (12:49 -0600)]
cciss: Fix problem with remove_from_scan_list on driver unload

cciss: Fix problem with remove_from_scan_list that on driver unload
it doesn't remove the controller from the scan list correctly if
the controller is currently being scanned for new devices.

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
15 years agocciss: Make device attributes static
Alex Chiang [Thu, 12 Nov 2009 18:49:14 +0000 (12:49 -0600)]
cciss: Make device attributes static

cciss: Make device attributes static

Cc: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Alex Chiang <achiang@hp.com>
Acked-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
15 years agoblock: jiffies fixes
Randy Dunlap [Wed, 11 Nov 2009 12:47:45 +0000 (13:47 +0100)]
block: jiffies fixes

Use HZ-independent calculation of milliseconds.
Add jiffies.h where it was missing since functions or macros
from it are used.

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
15 years agoblock: Expose discard granularity
Martin K. Petersen [Tue, 10 Nov 2009 10:50:21 +0000 (11:50 +0100)]
block: Expose discard granularity

While SSDs track block usage on a per-sector basis, RAID arrays often
have allocation blocks that are bigger.  Allow the discard granularity
and alignment to be set and teach the topology stacking logic how to
handle them.

Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
15 years agocfq-iosched: fix next_rq computation
Corrado Zoccolo [Sun, 8 Nov 2009 16:16:46 +0000 (17:16 +0100)]
cfq-iosched: fix next_rq computation

Cfq has a bug in computation of next_rq, that affects transition
between multiple sequential request streams in a single queue
(e.g.: two sequential buffered writers of the same priority),
causing the alternation between the two streams for a transient period.

  8,0    1    18737     0.260400660  5312  D   W 141653311 + 256
  8,0    1    20839     0.273239461  5400  D   W 141653567 + 256
  8,0    1    20841     0.276343885  5394  D   W 142803919 + 256
  8,0    1    20843     0.279490878  5394  D   W 141668927 + 256
  8,0    1    20845     0.292459993  5400  D   W 142804175 + 256
  8,0    1    20847     0.295537247  5400  D   W 141668671 + 256
  8,0    1    20849     0.298656337  5400  D   W 142804431 + 256
  8,0    1    20851     0.311481148  5394  D   W 141668415 + 256
  8,0    1    20853     0.314421305  5394  D   W 142804687 + 256
  8,0    1    20855     0.318960112  5400  D   W 142804943 + 256

The fix makes sure that the next_rq is computed from the last
dispatched request, and not affected by merging.

  8,0    1    37776     4.305161306     0  D   W 141738087 + 256
  8,0    1    37778     4.308298091     0  D   W 141738343 + 256
  8,0    1    37780     4.312885190     0  D   W 141738599 + 256
  8,0    1    37782     4.315933291     0  D   W 141738855 + 256
  8,0    1    37784     4.319064459     0  D   W 141739111 + 256
  8,0    1    37786     4.331918431  5672  D   W 142803007 + 256
  8,0    1    37788     4.334930332  5672  D   W 142803263 + 256
  8,0    1    37790     4.337902723  5672  D   W 142803519 + 256
  8,0    1    37792     4.342359774  5672  D   W 142803775 + 256
  8,0    1    37794     4.345318286     0  D   W 142804031 + 256

Signed-off-by: Corrado Zoccolo <czoccolo@gmail.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
15 years agoMerge branch 'for-jens' of git://git.drbd.org/linux-2.6-drbd into for-2.6.33
Jens Axboe [Wed, 4 Nov 2009 17:38:23 +0000 (18:38 +0100)]
Merge branch 'for-jens' of git://git.drbd.org/linux-2.6-drbd into for-2.6.33

15 years agoNow it is equal to DRBD release 8.3.5 without compat crap
Philipp Reisner [Tue, 27 Oct 2009 11:37:14 +0000 (12:37 +0100)]
Now it is equal to DRBD release 8.3.5 without compat crap

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
15 years agodrbd: performance - don't lose unplug events
Lars Ellenberg [Tue, 3 Nov 2009 01:22:06 +0000 (02:22 +0100)]
drbd: performance - don't lose unplug events

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
15 years agoDo not deadlock in drbd_disconnect() [bugz 258]
Philipp Reisner [Fri, 23 Oct 2009 11:57:45 +0000 (13:57 +0200)]
Do not deadlock in drbd_disconnect() [bugz 258]

When there are many blocks on the fly (ua), and the AL gets into "starving"
mode (random IO, scattered all over the device), and the connections gets
interrupted, the receiver thread deadlocks in the drbd_disconnect() code path.

Affected are only nodes in Primary role.

The bug triggers most likely on system that mirror over "long distances"

Regression introduced shortly before 8.3.3
with git commit 31e0f1250f174ac1ee317f360943a0159e19edc8

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
15 years agodrbdsetup X resume-io should be usable to resume IO [Bugz 256]
Philipp Reisner [Wed, 21 Oct 2009 11:08:29 +0000 (13:08 +0200)]
drbdsetup X resume-io should be usable to resume IO [Bugz 256]

When IO gets frozen due to a broken fence-peer script, the user
should be able to thaw IO by the resume-io command.

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
15 years agodrbd: fix check for too large lower level device
Lars Ellenberg [Mon, 12 Oct 2009 17:07:49 +0000 (19:07 +0200)]
drbd: fix check for too large lower level device

To check wether we are truncating a very large device due to limited
meta data space, we need to check the ll_dev size.

Also improve the printk to suggest "flexible" or "internal".

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
15 years agofix grammar in printk
Lars Ellenberg [Wed, 14 Oct 2009 07:36:49 +0000 (09:36 +0200)]
fix grammar in printk

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
15 years agochange default: by default, use socket buffer auto tuning
Lars Ellenberg [Mon, 21 Sep 2009 08:46:22 +0000 (10:46 +0200)]
change default: by default, use socket buffer auto tuning

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
15 years agoblock/scsi_ioctl.c: quiet sparse noise
H Hartley Sweeten [Wed, 4 Nov 2009 08:10:33 +0000 (09:10 +0100)]
block/scsi_ioctl.c: quiet sparse noise

Quiet sparse noise about symbol's not being declared.

Symbol blk_default_cmd_filter is only used locally and should be static.

The function blk_scsi_ioctl_init() is a fs_initcall and should also be
static.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
15 years agosendfile(): check f_op.splice_write() rather than f_op.sendpage()
Changli Gao [Wed, 4 Nov 2009 08:09:52 +0000 (09:09 +0100)]
sendfile(): check f_op.splice_write() rather than f_op.sendpage()

sendfile(2) was reworked with the splice infrastructure, but it still
checks f_op.sendpage() instead of f_op.splice_write() wrongly.  Although
if f_op.sendpage() exists, f_op.splice_write() always exists at the same
time currently, the assumption will be broken in future silently.  This
patch also brings a side effect: sendfile(2) can work with any output
file.  Some security checks related to f_op are added too.

Signed-off-by: Changli Gao <xiaosuo@gmail.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
15 years agoblock/ps3: fix slow VRAM IO
Hideyuki Sasaki [Wed, 4 Nov 2009 08:09:28 +0000 (09:09 +0100)]
block/ps3: fix slow VRAM IO

The current PS3 VRAM driver uses msleep() to wait for completion of RSX
DMA transfers between system memory and VRAM.  Depending on the system
timing, the processing delay and overhead of this msleep() call can
significantly impact VRAM driver IO.

To avoid the condition, add a short duration (200 usec max) udelay()
polling loop before entering the msleep() polling loop.

Signed-off-by: Hideyuki Sasaki <xhide@rd.scei.sony.co.jp>
Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com>
Acked-by: Jim Paris <jim@jtan.com>
Cc: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
15 years agocfq-iosched: get rid of the coop_preempt flag
Jens Axboe [Wed, 4 Nov 2009 07:54:55 +0000 (08:54 +0100)]
cfq-iosched: get rid of the coop_preempt flag

We need to rework this logic post the cooperating cfq_queue merging,
for now just get rid of it and Jeff Moyer will fix the fall out.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
15 years agocfq-iosched: fix merge error
Jens Axboe [Tue, 3 Nov 2009 20:25:45 +0000 (21:25 +0100)]
cfq-iosched: fix merge error

We ended up with testing the same condition twice, pretty
pointless. Remove that first if.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
15 years agoMerge branch 'for-linus' into for-2.6.33
Jens Axboe [Tue, 3 Nov 2009 20:14:39 +0000 (21:14 +0100)]
Merge branch 'for-linus' into for-2.6.33

Conflicts:
block/cfq-iosched.c

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
15 years agoMerge branch 'cfq-2.6.33' into for-2.6.33
Jens Axboe [Tue, 3 Nov 2009 20:12:10 +0000 (21:12 +0100)]
Merge branch 'cfq-2.6.33' into for-2.6.33

15 years agocfq-iosched: limit coop preemption
Shaohua Li [Tue, 3 Nov 2009 19:25:02 +0000 (20:25 +0100)]
cfq-iosched: limit coop preemption

CFQ has an optimization for cooperated applications. if several
io-context have close requests, they will get boost. But the
optimization get abused. Considering thread a, b, which work on one
file. a reads sectors s, s+2, s+4, ...; b reads sectors s+1, s+3, s
+5, ... Both a and b are sequential read, so they can open idle window.
a reads a sector s and goes to idle window and wakeup b. b reads sector
s+1, since in current implementation, cfq_should_preempt() thinks a and
b are cooperators, b will preempt a. b then reads sector s+1 and goes to
idle window and wakeup a. for the same reason, a will preempt b and
reads s+2. a and b will continue the circle. The circle will be very
long, and a and b will occupy whole disk queue. Other applications will
nearly have no chance to run.

Fix this limiting coop preempt until a queue is scheduled normally
again.

Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Acked-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
15 years agocfq-iosched: fix bad return value cfq_should_preempt()
Jens Axboe [Tue, 3 Nov 2009 19:21:35 +0000 (20:21 +0100)]
cfq-iosched: fix bad return value cfq_should_preempt()

Commit a6151c3a5c8e1ff5a28450bc8d6a99a2a0add0a7 inadvertently reversed
a preempt condition check, potentially causing a performance regression.
Make the meta check correct again.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
15 years agobacking-dev: bdi sb prune should be in the unregister path, not destroy
Jens Axboe [Tue, 3 Nov 2009 19:18:44 +0000 (20:18 +0100)]
backing-dev: bdi sb prune should be in the unregister path, not destroy

Commit 592b09a42fc3ae6737a0f3ecf4fee42ecd0296f8 was different from
the tested path, in that it moved the bdi super_block prune from
unregister to destroy context. This doesn't fully fix the sync hang
bug on unexpected device removal, as need to prune the bdi cache
pointer before killing flusher thread.

Tested-by: Artur Skawina <art.08.09@gmail.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
15 years agoMerge branch 'for-2.6.33' of git://git.kernel.dk/linux-2.6-block into for-2.6.33
Philipp Reisner [Tue, 3 Nov 2009 09:59:10 +0000 (10:59 +0100)]
Merge branch 'for-2.6.33' of git://git.kernel.dk/linux-2.6-block into for-2.6.33

15 years agoFix bio_alloc() and bio_kmalloc() documentation
Alberto Bertogli [Mon, 2 Nov 2009 10:39:42 +0000 (11:39 +0100)]
Fix bio_alloc() and bio_kmalloc() documentation

Commit 451a9ebf accidentally broke bio_alloc() and bio_kmalloc() comments by
(almost) swapping them.

This patch fixes that, by placing the comments in the right place.

Signed-off-by: Alberto Bertogli <albertito@blitiri.com.ar>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
15 years agoDo not __always_inline bvec_kmap_irq() and bvec_kunmap_irq()
Alberto Bertogli [Mon, 2 Nov 2009 10:40:16 +0000 (11:40 +0100)]
Do not __always_inline bvec_kmap_irq() and bvec_kunmap_irq()

So remove both the comment and the inline requirement, going back to the
inline hint.

Signed-off-by: Alberto Bertogli <albertito@blitiri.com.ar>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
15 years agobio_put(): add bio_clone() to the list of functions in the comment
Alberto Bertogli [Mon, 2 Nov 2009 10:39:22 +0000 (11:39 +0100)]
bio_put(): add bio_clone() to the list of functions in the comment

In bio_put()'s comment, add bio_clone() to the list of functions that can
give you a bio reference.

Signed-off-by: Alberto Bertogli <albertito@blitiri.com.ar>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
15 years agocfq-iosched: simplify prio-unboost code
Corrado Zoccolo [Mon, 2 Nov 2009 09:40:37 +0000 (10:40 +0100)]
cfq-iosched: simplify prio-unboost code

Eliminate redundant checks.

Signed-off-by: Corrado Zoccolo <czoccolo@gmail.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
15 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging-2.6
Linus Torvalds [Sat, 31 Oct 2009 19:16:20 +0000 (12:16 -0700)]
Merge git://git./linux/kernel/git/gregkh/staging-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging-2.6:
  Staging: fix wireless drivers depends
  Staging: wireless drivers Kconfig change
  Staging: android: mark subsystem as broken
  Staging: remove stlc45xx driver
  Staging: rtl8187se/rtl8192e/rtl8192su: allow module unload
  Staging: vt6656: fix the memory free bug in vntwusb_disconnect()
  Staging: Panel: prevent driver from calling misc_deregister twice on same ressource
  Staging: hv: fix oops in vmbus - missing #include
  Staging: hv: fix oops in vmbus - netvsc list_head
  Staging: hv: fix oops in vmbus - udev events
  Staging: hv: Fix vmbus load hang caused by faulty data packing
  Staging: hv: Fix null pointer error after vmbus loading
  Staging: hv TODO patches

15 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6
Linus Torvalds [Sat, 31 Oct 2009 19:16:09 +0000 (12:16 -0700)]
Merge git://git./linux/kernel/git/gregkh/usb-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6:
  USB: fsl_udc_core: Fix kernel oops on module removal
  USB: option: TLAYTECH TUE800 support
  USB: r8a66597-hcd: fix cannot detect a device when uses_new_polling is set
  USB: serial: sierra driver autopm fixes
  USB: serial: sierra driver send_setup() autopm fix
  USB: rndis_host: debug info clobbered before it is logged

15 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6
Linus Torvalds [Sat, 31 Oct 2009 19:15:58 +0000 (12:15 -0700)]
Merge git://git./linux/kernel/git/gregkh/tty-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6:
  tty: Mark generic_serial users as BROKEN

15 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6
Linus Torvalds [Sat, 31 Oct 2009 19:15:28 +0000 (12:15 -0700)]
Merge git://git./linux/kernel/git/gregkh/driver-core-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6:
  Documentation: ABI: /sys/devices/system/cpu/cpu#/node
  Documentation: ABI: /sys/devices/system/cpu/cpuidle/
  Documentation: ABI: /sys/devices/system/cpu/sched_[mc|smt]_power_savings
  Documentation: ABI: /sys/devices/system/cpu/cpu#/ topology files
  Documentation: ABI: /sys/devices/system/cpu/ topology files
  Documentation: ABI: document /sys/devices/system/cpu/
  Documentation: ABI: rename sysfs-devices-cache_disable properly
  Driver core: allow certain drivers prohibit bind/unbind via sysfs
  Driver core: fix driver_register() return value

15 years agoMerge branch 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6
Linus Torvalds [Sat, 31 Oct 2009 19:14:56 +0000 (12:14 -0700)]
Merge branch 'for-linus' of git://git390.marist.edu/linux-2.6

* 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6:
  [S390] smp: fix sigp sense handling
  [S390] smp: fix sigp stop handling
  [S390] cputime: fix overflow on 31 bit systems
  [S390] call home: fix string length handling
  [S390] call home: fix error handling in init function
  [S390] smp: fix prefix handling of offlined cpus
  [S390] s/r: cmm resume fix
  [S390] call home: fix local buffer usage in proc handler

15 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/fs/xfs/xfs
Linus Torvalds [Sat, 31 Oct 2009 19:12:49 +0000 (12:12 -0700)]
Merge branch 'for-linus' of git://git./fs/xfs/xfs

* 'for-linus' of git://git.kernel.org/pub/scm/fs/xfs/xfs:
  xfs: fix xfs_quota remove error
  xfs: free temporary cursor in xfs_dialloc

15 years agoMerge branch 'for-linus' of git://neil.brown.name/md
Linus Torvalds [Sat, 31 Oct 2009 19:12:19 +0000 (12:12 -0700)]
Merge branch 'for-linus' of git://neil.brown.name/md

* 'for-linus' of git://neil.brown.name/md:
  async_tx: fix asynchronous raid6 recovery for ddf layouts
  async_pq: rename scribble page
  async_pq: kill a stray dma_map() call and other cleanups
  md/raid6: kill a gcc-4.0.1 'uninitialized variable' warning
  raid6/async_tx: handle holes in block list in async_syndrome_val
  md/async: don't pass a memory pointer as a page pointer.
  md: Fix handling of raid5 array which is being reshaped to fewer devices.
  md: fix problems with RAID6 calculations for DDF.
  md/raid456: downlevel multicore operations to raid_run_ops
  md: drivers/md/unroll.pl replaced with awk analog
  md: remove clumsy usage of do_sync_mapping_range from bitmap code
  md: raid1/raid10: handle allocation errors during array setup.
  md/raid5: initialize conf->device_lock earlier
  md/raid1/raid10: add a cond_resched
  Revert "md: do not progress the resync process if the stripe was blocked"

15 years agodpt_i2o: Fix typo of EINVAL
OGAWA Hirofumi [Fri, 30 Oct 2009 08:02:31 +0000 (17:02 +0900)]
dpt_i2o: Fix typo of EINVAL

Commit ef7562b7f28319e6dd1f85dc1af87df2a7a84832 ("dpt_i2o: Fix up
copy*user") had a silly typo: EINVAL should be -EINVAL.

Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Cc: stable@kernel.org
Cc: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
15 years agoNOMMU: Don't pass NULL pointers to fput() in do_mmap_pgoff()
David Howells [Fri, 30 Oct 2009 13:13:26 +0000 (13:13 +0000)]
NOMMU: Don't pass NULL pointers to fput() in do_mmap_pgoff()

Don't pass NULL pointers to fput() in the error handling paths of the NOMMU
do_mmap_pgoff() as it can't handle it.

The following can be used as a test program:

int main() { static long long a[1024 * 1024 * 20] = { 0 }; return a;}

Without the patch, the code oopses in atomic_long_dec_and_test() as called by
fput() after the kernel complains that it can't allocate that big a chunk of
memory.  With the patch, the kernel just complains about the allocation size
and then the program segfaults during execve() as execve() can't complete the
allocation of all the new ELF program segments.

Reported-by: Robin Getz <rgetz@blackfin.uclinux.org>
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Robin Getz <rgetz@blackfin.uclinux.org>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
15 years agoDocumentation: ABI: /sys/devices/system/cpu/cpu#/node
Alex Chiang [Thu, 22 Oct 2009 04:15:30 +0000 (22:15 -0600)]
Documentation: ABI: /sys/devices/system/cpu/cpu#/node

Describe NUMA node symlink created for CPUs when CONFIG_NUMA is set.

Cc: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Alex Chiang <achiang@hp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
15 years agoDocumentation: ABI: /sys/devices/system/cpu/cpuidle/
Alex Chiang [Thu, 22 Oct 2009 03:45:41 +0000 (21:45 -0600)]
Documentation: ABI: /sys/devices/system/cpu/cpuidle/

Document cpuidle sysfs attributes by reading code, Documentation/cpuidle/,
and git logs.

Cc: Venki Pallipadi <venkatesh.pallipadi@intel.com>
Cc: Len Brown <lenb@kernel.org>
Signed-off-by: Alex Chiang <achiang@hp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
15 years agoDocumentation: ABI: /sys/devices/system/cpu/sched_[mc|smt]_power_savings
Alex Chiang [Thu, 22 Oct 2009 03:45:36 +0000 (21:45 -0600)]
Documentation: ABI: /sys/devices/system/cpu/sched_[mc|smt]_power_savings

Document sched_[mc|smt]_power_savings by reading existing code and
git logs.

Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Alex Chiang <achiang@hp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
15 years agoDocumentation: ABI: /sys/devices/system/cpu/cpu#/ topology files
Alex Chiang [Thu, 22 Oct 2009 03:45:31 +0000 (21:45 -0600)]
Documentation: ABI: /sys/devices/system/cpu/cpu#/ topology files

Add brief descriptions for the following sysfs files:

/sys/devices/system/cpu/cpu#/topology/core_id
/sys/devices/system/cpu/cpu#/topology/core_siblings
/sys/devices/system/cpu/cpu#/topology/core_siblings_list
/sys/devices/system/cpu/cpu#/topology/physical_package_id
/sys/devices/system/cpu/cpu#/topology/thread_siblings
/sys/devices/system/cpu/cpu#/topology/thread_siblings_list

The descriptions in Documentation/cputopology.txt weren't very
informative, so I attempted a better description based on code
reading and hopeful guessing.

Updated Documentation/cputopology.txt with the better descriptions and
fixed some style issues.

Cc: Mike Travis <travis@sgi.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Alex Chiang <achiang@hp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
15 years agoDocumentation: ABI: /sys/devices/system/cpu/ topology files
Alex Chiang [Thu, 22 Oct 2009 03:45:25 +0000 (21:45 -0600)]
Documentation: ABI: /sys/devices/system/cpu/ topology files

Add brief descriptions for the following sysfs files:

/sys/devices/system/cpu/kernel_max
/sys/devices/system/cpu/offline
/sys/devices/system/cpu/online
/sys/devices/system/cpu/possible
/sys/devices/system/cpu/present

Excerpted the relevant information from Documentation/cputopology.txt
and pointed back to cputopology.txt as the authoritative source of
information.

Cc: Mike Travis <travis@sgi.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Alex Chiang <achiang@hp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
15 years agoDocumentation: ABI: document /sys/devices/system/cpu/
Alex Chiang [Thu, 22 Oct 2009 03:45:20 +0000 (21:45 -0600)]
Documentation: ABI: document /sys/devices/system/cpu/

This interface has been around for a long time, but hasn't been
officially documented.

Document the top level sysfs directory for CPU attributes.

Signed-off-by: Alex Chiang <achiang@hp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
15 years agoDocumentation: ABI: rename sysfs-devices-cache_disable properly
Alex Chiang [Thu, 22 Oct 2009 03:45:15 +0000 (21:45 -0600)]
Documentation: ABI: rename sysfs-devices-cache_disable properly

Rename sysfs-devices-cache_disable to sysfs-devices-system-cpu, in
order to keep a stricter correlation between a sysfs directory and
its documentation.

Reported-by: David Rientjes <rientjes@google.com>
Signed-off-by: Alex Chiang <achiang@hp.com>
Acked-by: David Rientjes <rientjes@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
15 years agoDriver core: allow certain drivers prohibit bind/unbind via sysfs
Dmitry Torokhov [Tue, 13 Oct 2009 03:17:41 +0000 (20:17 -0700)]
Driver core: allow certain drivers prohibit bind/unbind via sysfs

Platform drivers registered via platform_driver_probe() can be bound
to devices only once, upon registration, because discard their probe()
routines to save memory. Unbinding the driver through sysfs 'unbind'
leaves the device stranded and confuses users so let's not create
bind and unbind attributes for such drivers.

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Cc: Éric Piel <eric.piel@tremplin-utc.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
15 years agoDriver core: fix driver_register() return value
Stas Sergeev [Sat, 17 Oct 2009 20:31:38 +0000 (00:31 +0400)]
Driver core: fix driver_register() return value

In this patch:
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=16dc42e018c2868211b4928f20a957c0c216126c
the check was added for another driver to already claim the same device
on the same bus. But the returned error code was wrong: to modprobe, the
-EEXIST means that _this_ driver is already installed. It therefore
doesn't produce the needed error message when _another_ driver is trying
to register for the same device.  Returning -EBUSY fixes the problem.

Signed-off-by: Stas Sergeev <stsp@aknet.ru>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
15 years agoUSB: fsl_udc_core: Fix kernel oops on module removal
Anton Vorontsov [Thu, 29 Oct 2009 16:50:43 +0000 (19:50 +0300)]
USB: fsl_udc_core: Fix kernel oops on module removal

fsl_udc_release() calls dma_free_coherent() with an inappropriate
device passed to it, and since the device has no dma_ops, the following
oops pops up:

  Kernel BUG at d103ce9c [verbose debug info unavailable]
  Oops: Exception in kernel mode, sig: 5 [#1]
  ...
  NIP [d103ce9c] fsl_udc_release+0x50/0x80 [fsl_usb2_udc]
  LR [d103ce74] fsl_udc_release+0x28/0x80 [fsl_usb2_udc]
  Call Trace:
  [cfbc7dc0] [d103ce74] fsl_udc_release+0x28/0x80 [fsl_usb2_udc]
  [cfbc7dd0] [c01a35c4] device_release+0x2c/0x90
  [cfbc7de0] [c016b480] kobject_cleanup+0x58/0x98
  [cfbc7e00] [c016c52c] kref_put+0x54/0x6c
  [cfbc7e10] [c016b360] kobject_put+0x34/0x64
  [cfbc7e20] [c01a1d0c] put_device+0x1c/0x2c
  [cfbc7e30] [d103dbfc] fsl_udc_remove+0xc0/0x1e4 [fsl_usb2_udc]
  ...

This patch fixes the issue by passing dev->parent, which points to
a correct device.

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Cc: Li Yang <leoli@freescale.com>
Cc: David Brownell <dbrownell@users.sourceforge.net>
Cc: Guennadi Liakhovetski <lg@denx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
15 years agoUSB: option: TLAYTECH TUE800 support
Bryan Wu [Thu, 22 Oct 2009 07:00:36 +0000 (15:00 +0800)]
USB: option: TLAYTECH TUE800 support

Add ID for Tlaytech TUE800 CDMA modem to the option driver.

Signed-off-by: Bryan Wu <bryan.wu@canonical.com>
Acked-By: Matthias Urlichs <matthias@urlichs.de>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
15 years agoUSB: r8a66597-hcd: fix cannot detect a device when uses_new_polling is set
Yoshihiro Shimoda [Wed, 21 Oct 2009 11:33:39 +0000 (20:33 +0900)]
USB: r8a66597-hcd: fix cannot detect a device when uses_new_polling is set

Signed-off-by: Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
15 years agoUSB: serial: sierra driver autopm fixes
Elina Pasheva [Tue, 27 Oct 2009 20:49:59 +0000 (13:49 -0700)]
USB: serial: sierra driver autopm fixes

This patch presents fixes for the autosuspend feature implementation in
sierra usb serial driver in  functions sierra_open(), sierra_close() and
stop_read_write_urbs().

The patch "sierra_close() must resume the device before it notifies it
of a closure" submitted by Oliver Neukum on Wed, October 14 has been
merged as fix in sierra_close() function.

The bug fix  in sierra_open() function restores the autopm interface
state on error condition.

The bug fix in in stop_read_write_urbs() function assures that both
receive and interrupt urbs are recycled.

Signed-off-by: Elina Pasheva <epasheva@sierrawireless.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
15 years agoUSB: serial: sierra driver send_setup() autopm fix
Elina Pasheva [Fri, 16 Oct 2009 19:04:54 +0000 (12:04 -0700)]
USB: serial: sierra driver send_setup() autopm fix

This patch presents a fix for the autosuspend feature implementation in
sierra usb serial driver for function sierra_send_setup().  Because it
is possible to call sierra_send_setup() before sierra_open() or after
sierra_close() we added a get/put interface activity to assure that the
usb control can happen even when the device is autosuspended.

Signed-off-by: Elina Pasheva <epasheva@sierrawireless.com>
Tested-by: Matthew Safar <msafar@sierrawireless.com>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
15 years agoUSB: rndis_host: debug info clobbered before it is logged
George Nassar [Wed, 14 Oct 2009 23:27:41 +0000 (18:27 -0500)]
USB: rndis_host: debug info clobbered before it is logged

The MTU throttle-down if a RNDIS device doesn't support a particular
packet size is being incorrectly logged.  The attempted packet size is
being clobbered before it gets logged.

First patch; please inform if I'm doing this incorrectly.  Diff'd
against latest official source as per the FAQ; forward port to current
git version is straightforward.

Signed-off-by: George Nassar <george.nassar@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
15 years agoStaging: fix wireless drivers depends
Randy Dunlap [Thu, 29 Oct 2009 16:52:02 +0000 (09:52 -0700)]
Staging: fix wireless drivers depends

These drivers can (erroneously) be enabled even when
CONFIG_NET=n, CONFIG_NETDEVICES=n, CONFIG_WLAN=n, etc.
Stop this.

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
15 years agoStaging: wireless drivers Kconfig change
Greg Kroah-Hartman [Tue, 27 Oct 2009 22:46:18 +0000 (15:46 -0700)]
Staging: wireless drivers Kconfig change

Change the wireless drivers to depend on CONFIG_WLAN instead of
CONFIG_WLAN_80211 which is going away soon.

Cc: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
15 years agoStaging: android: mark subsystem as broken
Greg Kroah-Hartman [Mon, 26 Oct 2009 23:03:51 +0000 (16:03 -0700)]
Staging: android: mark subsystem as broken

It's causing lots of build errors, so just mark it as broken.  It is
scheduled to be removed in 2.6.33 anyway.

Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
15 years agoStaging: remove stlc45xx driver
Greg Kroah-Hartman [Mon, 26 Oct 2009 23:35:32 +0000 (16:35 -0700)]
Staging: remove stlc45xx driver

It's no longer needed as the p54spi driver is the same thing,
under a different name and in the correct portion of the kernel tree.

Cc: Javier Martinez Canillas <martinez.javier@gmail.com>
Cc: Christian Lamparter <chunkeey@googlemail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
15 years agoStaging: rtl8187se/rtl8192e/rtl8192su: allow module unload
Herton Ronaldo Krzesinski [Fri, 2 Oct 2009 14:03:38 +0000 (11:03 -0300)]
Staging: rtl8187se/rtl8192e/rtl8192su: allow module unload

On rtl81* additions, they had its wireless stack made builtin instead of
separated modules. But try_module_get/module_put in stack were kept,
they are uneeded with the stack builtin and makes rtl81* modules
impossible to remove on a system with an rtl81* card. request_module
calls are also uneeded with stack builtin, so remove them too.

Signed-off-by: Herton Ronaldo Krzesinski <herton@mandriva.com.br>
Cc: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
15 years agoStaging: vt6656: fix the memory free bug in vntwusb_disconnect()
miaofng [Tue, 29 Sep 2009 07:02:53 +0000 (15:02 +0800)]
Staging: vt6656: fix the memory free bug in vntwusb_disconnect()

This patch is used to solve the memory bug when people plug out the wusb card then plug in.
Error logs are following:

root@smdk2440:~# ifdown eth1
AP deauthed me, reason=2.
Config_FileOperation file Not exist
Zone=[1][J][P]!!
WPA: Terminating
root@smdk2440:~#  ----> !!!!!!!!!!!!!!here plug out the wusbcard
usb 1-1: USB disconnect, address 4
----> !!!!!!!!!!!!!!!!!!!here plug in the wusb card
usb 1-1: new full speed USB device using s3c2410-ohci and address 5
usb 1-1: New USB device found, idVendor=160a, idProduct=3184
usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
usb 1-1: Product: VNT USB-802.11 Wireless LAN Adapter
usb 1-1: Manufacturer: VIA Networking Technologies, Inc.
usb 1-1: configuration #1 chosen from 1 choice
VIA Networking Wireless LAN USB Driver Ver. 1.19_12
Copyright (c) 2004 VIA Networking Technologies, Inc.
kernel BUG at mm/slab.c:2974!
Unable to handle kernel NULL pointer dereference at virtual address 00000000
pgd = c0004000
[00000000] *pgd=00000000
Internal error: Oops: 817 [#1] PREEMPT
Modules linked in: vt6656_stage
CPU: 0    Not tainted  (2.6.32-rc2 #14)
PC is at __bug+0x1c/0x28
LR is at __bug+0x18/0x28
pc : [<c002fb10>]    lr : [<c002fb0c>]    psr: 40000093
sp : c3867c68  ip : c3867bd0  fp : c3866000
r10: c3800600  r9 : c3802430  r8 : 00000004
r7 : c3802428  r6 : c3802660  r5 : c3802420  r4 : a0000013
r3 : 00000000  r2 : c3866000  r1 : 00000003  r0 : 00000024
Flags: nZcv  IRQs off  FIQs on  Mode SVC_32  ISA ARM  Segment kernel
Control: 0000717f  Table: 330a8000  DAC: 00000017
Process khubd (pid: 152, stack limit = 0xc3866270)
Stack: (0xc3867c68 to 0xc3868000)
7c60:                   c0093fdc c0094088 000000d0 000000d0 00000000 000080d0
7c80: 00000000 a0000013 c39ebec0 c3800600 000080d0 00000001 c03f13cc 00000006
7ca0: c02b36f0 c0094574 c0043428 0001c9de c39ebec0 c39ebea0 c3000c00 c02a6a84
7cc0: 89705f41 c3000c00 c39ebec0 c39ebea0 c3000c00 bf036f24 c39ebec8 00000006
7ce0: 00000000 c3000c00 c39ebec0 c39ebea0 c3000c00 bf036f24 c39ebec8 00000006
7d00: 00000000 bf003398 c00aa514 c3867d20 0000a1ff c00e1448 c39d9f84 c39aabe8
7d20: c3867d50 c00e1888 c39aabe8 c39ebea0 c39ebec0 bf036ebc c3000c00 bf036f24
7d40: 0000bec8 01000000 00000000 c39ebea0 c39ebec0 bf036ebc c3000c00 bf036f24
7d60: c39ebec8 00000000 00000000 c0223798 c39ebec0 c01daa14 bf036eec c3867da0
7d80: c045a4f8 c01da6e4 c39ebec0 00000000 c01daa14 c39ebec0 c3867da0 c01d9870
7da0: c38331a8 c39fcb94 c005b3b4 c39ebec0 c39ebec0 c39ebef4 00000000 c01da890
7dc0: c39ebec0 c39ebec0 c3000c00 c01d97f4 00000000 c01d8470 c39ebea0 c3000c68
7de0: 00000000 c3000c68 c3218a00 c3abcd20 00000001 c39ebec0 c39ebea0 c3000c00
7e00: 00000000 c3000c68 c3218a00 c3abcd20 00000001 c0221ee8 00000001 00000000
7e20: 00000000 00000000 00001388 00000000 c3000c04 c3000c68 c3bc29c0 00000001
7e40: c3bc29c4 00000001 c03f4af8 00000000 c39fe780 c3000c00 00000001 c045ab04
7e60: c3867eb8 c045a3bc c3000c70 00000000 00000000 c0229238 c3000c68 c0223210
7e80: c3000c00 c045aaf0 c045ab04 c0223230 c3000c68 c01daa14 c045ab04 c01da6e4
7ea0: c3000c68 00000000 c01daa14 c3000c68 c3867eb8 c01d9870 c38331a8 c3862f54
7ec0: c005b3b4 c3000c68 c3000c68 c3000c9c 00000002 c01da890 c3867ef9 c3000c68
7ee0: c3829f60 c01d97f4 00000000 c01d8470 c38918e0 c3aaf468 39383102 c300343a
7f00: 00000001 c0219660 c03f1768 c3000c00 00000000 c3000c68 00000002 c3aaf814
7f20: 00000001 00000101 c38918e0 c021b6e0 00000002 00000000 00000000 c3000c00
7f40: c38917c0 c021c418 00000064 00000064 00000101 c3867f60 c005b920 c3867f94
7f60: c3891830 c3aaf400 c3866000 c3aaf400 c3aaf800 00000000 c38918e0 c3aaf400
7f80: 00000012 00000000 00000000 c3837920 c00574a0 c3867f94 c3867f94 00000101
7fa0: 01010001 c3867fd4 c381bf48 c3867fd4 c381bf48 00000000 c021ba3c 00000000
7fc0: 00000000 00000000 00000000 c00573dc 00000000 00000000 c3867fd8 c3867fd8
7fe0: 00000000 00000000 00000000 00000000 00000000 c002ce88 00000000 ffff0000
[<c002fb10>] (__bug+0x1c/0x28) from [<c0094088>] (cache_alloc_refill+0x13c/0x594)
[<c0094088>] (cache_alloc_refill+0x13c/0x594) from [<c0094574>] (__kmalloc+0x94/0xd0)
[<c0094574>] (__kmalloc+0x94/0xd0) from [<c02a6a84>] (alloc_netdev_mq+0x48/0x1b0)
[<c02a6a84>] (alloc_netdev_mq+0x48/0x1b0) from [<bf003398>] (vntwusb_found1+0x58/0x53c [vt6656_stage])
[<bf003398>] (vntwusb_found1+0x58/0x53c [vt6656_stage]) from [<c0223798>] (usb_probe_interface+0x130/0x180)
[<c0223798>] (usb_probe_interface+0x130/0x180) from [<c01da6e4>] (driver_probe_device+0xac/0x164)
[<c01da6e4>] (driver_probe_device+0xac/0x164) from [<c01d9870>] (bus_for_each_drv+0x50/0x90)
[<c01d9870>] (bus_for_each_drv+0x50/0x90) from [<c01da890>] (device_attach+0x50/0x68)
[<c01da890>] (device_attach+0x50/0x68) from [<c01d97f4>] (bus_probe_device+0x28/0x54)
[<c01d97f4>] (bus_probe_device+0x28/0x54) from [<c01d8470>] (device_add+0x3b4/0x4f0)
[<c01d8470>] (device_add+0x3b4/0x4f0) from [<c0221ee8>] (usb_set_configuration+0x524/0x5b8)
[<c0221ee8>] (usb_set_configuration+0x524/0x5b8) from [<c0229238>] (generic_probe+0x5c/0xa0)
[<c0229238>] (generic_probe+0x5c/0xa0) from [<c0223230>] (usb_probe_device+0x48/0x54)
[<c0223230>] (usb_probe_device+0x48/0x54) from [<c01da6e4>] (driver_probe_device+0xac/0x164)
[<c01da6e4>] (driver_probe_device+0xac/0x164) from [<c01d9870>] (bus_for_each_drv+0x50/0x90)
[<c01d9870>] (bus_for_each_drv+0x50/0x90) from [<c01da890>] (device_attach+0x50/0x68)
[<c01da890>] (device_attach+0x50/0x68) from [<c01d97f4>] (bus_probe_device+0x28/0x54)
[<c01d97f4>] (bus_probe_device+0x28/0x54) from [<c01d8470>] (device_add+0x3b4/0x4f0)
[<c01d8470>] (device_add+0x3b4/0x4f0) from [<c021b6e0>] (usb_new_device+0x100/0x174)
[<c021b6e0>] (usb_new_device+0x100/0x174) from [<c021c418>] (hub_thread+0x9dc/0xeec)
[<c021c418>] (hub_thread+0x9dc/0xeec) from [<c00573dc>] (kthread+0x78/0x80)
[<c00573dc>] (kthread+0x78/0x80) from [<c002ce88>] (kernel_thread_exit+0x0/0x8)
Code: e1a01000 e59f000c eb005014 e3a03000 (e5833000)
---[ end trace 2a51e0dbab9e4fbe ]---
note: khubd[152] exited with preempt_count 1

Signed-off-by: miaofng <miaofng@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
15 years agoStaging: Panel: prevent driver from calling misc_deregister twice on same ressource
Peter Huewe [Mon, 28 Sep 2009 23:22:40 +0000 (01:22 +0200)]
Staging: Panel: prevent driver from calling misc_deregister twice on same ressource

This patch prevents the driver from calling misc_deregister twice on the same
ressouce when unloading the driver.
Unloading the driver without this patch results in a Kernel BUG like this:
Panel driver version 0.9.5 registered on parport0 (io=0x378).
BUG: unable to handle kernel paging request at 0000000000100108
IP: [<ffffffff803c02ee>] misc_deregister+0x2d/0x90
PGD 6caff067 PUD 762b7067 PMD 0
Oops: 0002 [#1] PREEMPT SMP
last sysfs file: /sys/devices/platform/w83627hf.656/in8_input
...

This patch fixes this issue, although maybe not in the best way possible :)

linux version v2.6.32-rc1 - linus git tree, Di 29. Sep 01:10:18 CEST 2009

Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
15 years agoStaging: hv: fix oops in vmbus - missing #include
Milan Dadok [Wed, 28 Oct 2009 22:23:50 +0000 (23:23 +0100)]
Staging: hv: fix oops in vmbus - missing #include

Add missing #includes to make hv module compile successfull.

Signed-off-by: Milan Dadok <milan@dadok.name>
Cc: Hank Janssen <hjanssen@microsoft.com>
Cc: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
15 years agoStaging: hv: fix oops in vmbus - netvsc list_head
Milan Dadok [Wed, 28 Oct 2009 22:23:37 +0000 (23:23 +0100)]
Staging: hv: fix oops in vmbus - netvsc list_head

Remove incorrect list_head usage. Variable of type list_head was used in
some function's arguments as list item.

Signed-off-by: Milan Dadok <milan@dadok.name>
Cc: Hank Janssen <hjanssen@microsoft.com>
Cc: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
15 years agoStaging: hv: fix oops in vmbus - udev events
Milan Dadok [Wed, 28 Oct 2009 22:23:27 +0000 (23:23 +0100)]
Staging: hv: fix oops in vmbus - udev events

Fix typos in udev event send and guid variables copy

Signed-off-by: Milan Dadok <milan@dadok.name>
Cc: Hank Janssen <hjanssen@microsoft.com>
Cc: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
15 years agoStaging: hv: Fix vmbus load hang caused by faulty data packing
Hank Janssen [Fri, 16 Oct 2009 20:11:36 +0000 (20:11 +0000)]
Staging: hv: Fix vmbus load hang caused by faulty data packing

Fix vmbus load hang caused by wrong data packing.

Signed-off-by: Hank Janssen<hjanssen@microsoft.com>
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
15 years agoStaging: hv: Fix null pointer error after vmbus loading
Haiyang Zhang [Fri, 23 Oct 2009 18:14:24 +0000 (18:14 +0000)]
Staging: hv: Fix null pointer error after vmbus loading

Fix null pointer error after vmbus loading. Remove code that checks for
dev_name, the affected structure is kzalloc-ed prior to this routine, so
it is always null at this stage.

Signed-off-by: Hank Janssen <hjanssen@microsoft.com>
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
15 years agoStaging: hv TODO patches
Stephen Hemminger [Fri, 9 Oct 2009 22:47:50 +0000 (15:47 -0700)]
Staging: hv TODO patches

Update for more items

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Cc: Hank Janssen <hjanssen@microsoft.com>
Cc: Haiyang Zhang <haiyangz@microsoft.com>.
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
15 years agotty: Mark generic_serial users as BROKEN
Alan Cox [Thu, 29 Oct 2009 12:16:22 +0000 (12:16 +0000)]
tty: Mark generic_serial users as BROKEN

There isn't much else I can do with these. I can find no hardware for any
of them and no users. The code is broken.

Signed-off-by: Alan Cox <alan@linux.intel.com>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
15 years agoxfs: fix xfs_quota remove error
Ryota Yamauchi [Fri, 30 Oct 2009 08:27:44 +0000 (09:27 +0100)]
xfs: fix xfs_quota remove error

The xfs_quota returns ENOSYS when remove command is executed.
Reproducable with following steps.

    # mount -t xfs -o uquota /dev/sda7 /mnt/mp1
    # xfs_quota -x -c off -c remove
    XFS_QUOTARM: Function not implemented.

The remove command is allowed during quotaoff, but xfs_fs_set_xstate()
checks whether quota is running, and it leads to ENOSYS.

To solve this problem, add a check for X_QUOTARM.

Signed-off-by: Ryota Yamauchi <r-yamauchi@vf.jp.nec.com>
Signed-off-by: Utako Kusaka <u-kusaka@wm.jp.nec.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
15 years agoxfs: free temporary cursor in xfs_dialloc
Eric Sandeen [Fri, 30 Oct 2009 08:27:07 +0000 (09:27 +0100)]
xfs: free temporary cursor in xfs_dialloc

Commit bd169565993b39b9b4b102cdac8b13e0a259ce2f seems
to have a slight regression where this code path:

    if (!--searchdistance) {
        /*
         * Not in range - save last search
         * location and allocate a new inode
         */
        ...
        goto newino;
    }

doesn't free the temporary cursor (tcur) that got dup'd in
this function.

This leaks an item in the xfs_btree_cur zone, and it's caught
on module unload:

===========================================================
BUG xfs_btree_cur: Objects remaining on kmem_cache_close()
-----------------------------------------------------------

It seems like maybe a single free at the end of the function might
be cleaner, but for now put a del_cursor right in this code block
similar to the handling in the rest of the function.

Signed-off-by: Eric Sandeen <sandeen@sandeen.net>
Signed-off-by: Christoph Hellwig <hch@lst.de>
15 years agoMerge branch 'bugfix' of git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen
Linus Torvalds [Thu, 29 Oct 2009 22:03:36 +0000 (15:03 -0700)]
Merge branch 'bugfix' of git://git./linux/kernel/git/jeremy/xen

* 'bugfix' of git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen:
  xen: set up mmu_ops before trying to set any ptes

15 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/ide-2.6
Linus Torvalds [Thu, 29 Oct 2009 16:22:34 +0000 (09:22 -0700)]
Merge git://git./linux/kernel/git/davem/ide-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/ide-2.6:
  ide: Serialize CMD643 and CMD646 to fix a hardware bug with SSD