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authorPeter Pan(潘卫平) <panweiping3@gmail.com>2011-12-05 21:39:41 +0000
committerDavid S. Miller <davem@davemloft.net>2011-12-06 13:02:28 -0500
commit99b53bdd810611cc178e1a86bc112d8f4f56a1e9 (patch)
tree0d663b68aaa3c5e1e7290809183a3031be6c9072 /net
parent65e9d805e96c7e6a15c1e3b0c00a842d2249bab8 (diff)
downloadlwn-99b53bdd810611cc178e1a86bc112d8f4f56a1e9.tar.gz
lwn-99b53bdd810611cc178e1a86bc112d8f4f56a1e9.zip
ipv4:correct description for tcp_max_syn_backlog
Since commit c5ed63d66f24(tcp: fix three tcp sysctls tuning), sysctl_max_syn_backlog is determined by tcp_hashinfo->ehash_mask, and the minimal value is 128, and it will increase in proportion to the memory of machine. The original description for tcp_max_syn_backlog and sysctl_max_syn_backlog are out of date. Changelog: V2: update description for sysctl_max_syn_backlog Signed-off-by: Weiping Pan <panweiping3@gmail.com> Reviewed-by: Shan Wei <shanwei88@gmail.com> Acked-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/core/request_sock.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/net/core/request_sock.c b/net/core/request_sock.c
index 182236b2510a..9b570a6a33c5 100644
--- a/net/core/request_sock.c
+++ b/net/core/request_sock.c
@@ -26,10 +26,11 @@
* but then some measure against one socket starving all other sockets
* would be needed.
*
- * It was 128 by default. Experiments with real servers show, that
+ * The minimum value of it is 128. Experiments with real servers show that
* it is absolutely not enough even at 100conn/sec. 256 cures most
- * of problems. This value is adjusted to 128 for very small machines
- * (<=32Mb of memory) and to 1024 on normal or better ones (>=256Mb).
+ * of problems.
+ * This value is adjusted to 128 for low memory machines,
+ * and it will increase in proportion to the memory of machine.
* Note : Dont forget somaxconn that may limit backlog too.
*/
int sysctl_max_syn_backlog = 256;