Merge branch 'parisc-4.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller...

[firefly-linux-kernel-4.4.55.git] / Documentation / networking / ip-sysctl.txt

diff --git a/Documentation/networking/ip-sysctl.txt b/Documentation/networking/ip-sysctl.txt
index 99838259e2e67fa4203ed9685ccd4818b532a2dc..05915be862356cf75230851920af5d4738b095b5 100644 (file)
--- a/Documentation/networking/ip-sysctl.txt
+++ b/Documentation/networking/ip-sysctl.txt
@@ -384,6 +384,14 @@ tcp_mem - vector of 3 INTEGERs: min, pressure, max
        Defaults are calculated at boot time from amount of available
        memory.
 
+tcp_min_rtt_wlen - INTEGER
+       The window length of the windowed min filter to track the minimum RTT.
+       A shorter window lets a flow more quickly pick up new (higher)
+       minimum RTT when it is moved to a longer path (e.g., due to traffic
+       engineering). A longer window makes the filter more resistant to RTT
+       inflations such as transient congestion. The unit is seconds.
+       Default: 300
+
 tcp_moderate_rcvbuf - BOOLEAN
        If set, TCP performs receive buffer auto-tuning, attempting to
        automatically size the buffer (no greater than tcp_rmem[2]) to
@@ -425,6 +433,15 @@ tcp_orphan_retries - INTEGER
        you should think about lowering this value, such sockets
        may consume significant resources. Cf. tcp_max_orphans.
 
+tcp_recovery - INTEGER
+       This value is a bitmap to enable various experimental loss recovery
+       features.
+
+       RACK: 0x1 enables the RACK loss detection for fast detection of lost
+             retransmissions and tail drops.
+
+       Default: 0x1
+
 tcp_reordering - INTEGER
        Initial reordering level of packets in a TCP stream.
        TCP stack can then dynamically adjust flow reordering level
@@ -884,8 +901,8 @@ icmp_ignore_bogus_error_responses - BOOLEAN
 
 icmp_errors_use_inbound_ifaddr - BOOLEAN
 
-       If zero, icmp error messages except redirects are sent with the primary
-       address of the exiting interface.
+       If zero, icmp error messages are sent with the primary address of
+       the exiting interface.
 
        If non-zero, the message will be sent with the primary address of
        the interface that received the packet that caused the icmp error.
@@ -897,23 +914,8 @@ icmp_errors_use_inbound_ifaddr - BOOLEAN
        then the primary address of the first non-loopback interface that
        has one will be used regardless of this setting.
 
-       The source address selection of icmp redirect messages is controlled by
-       icmp_errors_use_inbound_ifaddr.
        Default: 0
 
-icmp_redirects_use_orig_daddr - BOOLEAN
-
-       If zero, icmp redirect messages are sent using the address specified for
-       other icmp errors by icmp_errors_use_inbound_ifaddr.
-
-       If non-zero, the message will be sent with the destination address of
-       the packet that caused the icmp redirect.
-       This behaviour is the preferred one on VRRP routers (see RFC 5798
-       section 8.1.1).
-
-       Default: 0
-
-
 igmp_max_memberships - INTEGER
        Change the maximum number of multicast groups we can subscribe to.
        Default: 20
@@ -1214,7 +1216,8 @@ tag - INTEGER
 xfrm4_gc_thresh - INTEGER
        The threshold at which we will start garbage collecting for IPv4
        destination cache entries.  At twice this value the system will
-       refuse new allocations.
+       refuse new allocations. The value must be set below the flowcache
+       limit (4096 * number of online cpus) to take effect.
 
 igmp_link_local_mcast_reports - BOOLEAN
        Enable IGMP reports for link local multicast groups in the
@@ -1660,7 +1663,8 @@ ratelimit - INTEGER
 xfrm6_gc_thresh - INTEGER
        The threshold at which we will start garbage collecting for IPv6
        destination cache entries.  At twice this value the system will
-       refuse new allocations.
+       refuse new allocations. The value must be set below the flowcache
+       limit (4096 * number of online cpus) to take effect.
 
 
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