[PATCH] tcp: disable auto corking by default
From: Thomas Glanzmann <hidden>
Date: 2014-02-08 09:19:48
Also in:
lkml
Subsystem:
networking [general], networking [tcp], the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Neal Cardwell, Linus Torvalds
When using auto corking with iSCSI the round trip time at least increases by factor 25 probably more. Other protocols are very likely also effected. Signed-off-by: Thomas Glanzmann <redacted> --- net/ipv4/tcp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 4475b3b..da563a4 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c@@ -285,7 +285,7 @@ int sysctl_tcp_fin_timeout __read_mostly = TCP_FIN_TIMEOUT; int sysctl_tcp_min_tso_segs __read_mostly = 2; -int sysctl_tcp_autocorking __read_mostly = 1; +int sysctl_tcp_autocorking __read_mostly = 0; struct percpu_counter tcp_orphan_count; EXPORT_SYMBOL_GPL(tcp_orphan_count);
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1.7.10.4