From: David Miller <davem@davemloft.net>
To: bhutchings@solarflare.com
Cc: novickivan@gmail.com, netdev@vger.kernel.org,
jmatthews@greenplum.com, theath@greenplum.com,
herbert@gondor.apana.org.au
Subject: Re: TCP not triggering a fast retransmit?
Date: Wed, 30 Jun 2010 14:22:56 -0700 (PDT) [thread overview]
Message-ID: <20100630.142256.77345240.davem@davemloft.net> (raw)
In-Reply-To: <1277931829.4878.9.camel@localhost>
From: Ben Hutchings <bhutchings@solarflare.com>
Date: Wed, 30 Jun 2010 22:03:49 +0100
> In that packet capture I see TCP payload lengths which are 2, 3 and 4
> times the usual MSS of 1448 bytes, which implies that GRO or LRO is in
> use. In RHEL 5.4 the TCP stack does not ACK often enough in this case
> because it is missing this change:
>
> commit ff9b5e0f08cb650d113eef0c654f931c0a7ae730
> Author: Herbert Xu <herbert@gondor.apana.org.au>
> Date: Thu Aug 31 15:11:02 2006 -0700
>
> [TCP]: Fix rcv mss estimate for LRO
It certainly could be, I'll try make sure this gets rectified,
thanks!
next prev parent reply other threads:[~2010-06-30 21:22 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-06-30 18:04 TCP not triggering a fast retransmit? Ivan Novick
2010-06-30 19:26 ` Brian Bloniarz
2010-06-30 20:06 ` Mitchell Erblich
2010-06-30 20:14 ` Ivan Novick
2010-06-30 20:43 ` Mitchell Erblich
2010-06-30 21:03 ` Ben Hutchings
2010-06-30 21:22 ` David Miller [this message]
2010-06-30 23:10 ` Mitchell Erblich
2010-07-01 0:27 ` Ivan Novick
2010-07-01 1:23 ` Ben Hutchings
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