On Thu, 2012-08-23 at 14:37 +0200, Alex Bergmann wrote: > > From be551f82499112e4775b6d579d58967510b6d492 Mon Sep 17 00:00:00 2001 > From: Alexander Bergmann <a...@linlab.net> > Date: Thu, 23 Aug 2012 14:33:35 +0200 > Subject: [PATCH 1/1] tcp: Increase timeout for SYN segments > > Commit 9ad7c049 changed the initRTO from 3secs to 1sec in accordance to > RFC6298 (former RFC2988bis). This reduced the time till the last SYN > retransmission packet gets sent from 93secs to 31secs. > > RFC1122 is stating that the retransmission should be done for at least 3 > minutes, but this seems to be quite high.[1] > > This patch increases the value of TCP_SYN_RETRIES to the value of 6, > providing a retransmission window of 63secs. > > [1] RFC 1122 - 4.2.3.5 TCP Connection Failures > > Signed-off-by: Alexander Bergmann <a...@linlab.net> > --- > include/net/tcp.h | 2 +- > 1 files changed, 1 insertions(+), 1 deletions(-) > > diff --git a/include/net/tcp.h b/include/net/tcp.h > index 1f000ff..f309e93 100644 > --- a/include/net/tcp.h > +++ b/include/net/tcp.h > @@ -98,7 +98,7 @@ extern void tcp_time_wait(struct sock *sk, int state, int > timeo); > * 15 is ~13-30min depending on RTO. > */ > > -#define TCP_SYN_RETRIES 5 /* number of times to retry active > opening a > +#define TCP_SYN_RETRIES 6 /* number of times to retry active > opening a > * connection: ~180sec is RFC minimum */ > > #define TCP_SYNACK_RETRIES 5 /* number of times to retry passive opening a
Acked-by: Eric Dumazet <eduma...@google.com> A change of the comment might be good, to help future readers. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
