From: David Miller <davem@davemloft.net>
To: shemminger@osdl.org
Cc: herbert@gondor.apana.org.au, mingo@elte.hu, akpm@osdl.org,
wenji@fnal.gov, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: Bug 7596 - Potential performance bottleneck for Linxu TCP
Date: Tue, 19 Dec 2006 21:15:51 -0800 (PST) [thread overview]
Message-ID: <20061219.211551.112620476.davem@davemloft.net> (raw)
In-Reply-To: <20061219211124.061b5c2d@localhost.localdomain>
From: Stephen Hemminger <shemminger@osdl.org>
Date: Tue, 19 Dec 2006 21:11:24 -0800
> It was the realtime/normal comments that piqued my interest.
> Perhaps we should either tweak process priority or remove
> the comments.
I mentioned that to Linus once and he said the entire
idea was bogus.
With the recent tcp_recvmsg() preemption issue thread,
I agree with his sentiments even more than I did previously.
What needs to happen is to liberate the locking so that
input packet processing can occur in parallel with
tcp_recvmsg(), instead of doing this bogus backlog thing
which can wedge TCP ACK processing for an entire quantum
if we take a kernel preemption while the process has the
socket lock held.
next prev parent reply other threads:[~2006-12-20 5:16 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <HNEBLGGMEGLPMPPDOPMGKEAJCGAA.wenji@fnal.gov>
2006-11-29 23:27 ` [Changelog] - Potential performance bottleneck for Linxu TCP Wenji Wu
2006-11-29 23:28 ` [patch 1/4] " Wenji Wu
2006-11-29 23:29 ` [patch 2/4] " Wenji Wu
2006-11-29 23:30 ` [patch 3/4] " Wenji Wu
2006-11-29 23:31 ` [patch 4/4] " Wenji Wu
2006-11-30 0:53 ` [patch 1/4] " David Miller
2006-11-30 1:08 ` Andrew Morton
2006-11-30 1:13 ` David Miller
2006-11-30 6:04 ` Mike Galbraith
2006-11-29 23:36 ` [Changelog] " Martin Bligh
2006-11-29 23:42 ` Bug 7596 " Andrew Morton
2006-11-30 6:32 ` Ingo Molnar
2006-12-19 18:37 ` Stephen Hemminger
2006-12-19 23:52 ` Herbert Xu
2006-12-20 2:55 ` David Miller
2006-12-20 5:11 ` Stephen Hemminger
2006-12-20 5:15 ` David Miller [this message]
2006-11-30 1:01 ` David Miller
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