staging/lustre/osc: some cleanup to reduce stack overflow chance
authorBobi Jam <bobijam.xu@intel.com>
Mon, 3 Jun 2013 13:40:45 +0000 (21:40 +0800)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Mon, 3 Jun 2013 18:26:35 +0000 (11:26 -0700)
commitcad6fafa68de08570b499396d82a62c68140bfd3
tree8b606585945f1893df69decfa0d3f3006c1d06cd
parentbc9691761818e72527d67c5f9a01cc09df3c04cf
staging/lustre/osc: some cleanup to reduce stack overflow chance

ptlrpcd_add_req() will wake_up other process, do not hold a spinlock
before calling ptlrpcd_queue_work()->ptlrpcd_add_req().

If current process is allocating memory, memory shrinker could get to
osc_lru_del(), don't call osc_lru_shrink() further since it could
lead a long calling chain.

Use static string OES_STRINGS in OSC_EXTENT_DUMP() to reduce stack
footprint.

Alloc crattr on heap for osc_build_rpc() to reduce stack footprint.

Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-3281
Lustre-change: http://review.whamcloud.com/6270
Signed-off-by: Bobi Jam <bobijam.xu@intel.com>
Reviewed-by: Jinshan Xiong <jinshan.xiong@intel.com>
Reviewed-by: Keith Mannthey <keith.mannthey@intel.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Signed-off-by: Peng Tao <tao.peng@emc.com>
Signed-off-by: Andreas Dilger <andreas.dilger@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/staging/lustre/lustre/osc/osc_cache.c
drivers/staging/lustre/lustre/osc/osc_cl_internal.h
drivers/staging/lustre/lustre/osc/osc_page.c
drivers/staging/lustre/lustre/osc/osc_request.c