linux-kernel - Re: Major network performance regression in 3.7

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Message-ID: <1357497541.6919.519.camel@edumazet-glaptop>
Date:	Sun, 06 Jan 2013 10:39:01 -0800
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Willy Tarreau <w@....eu>
Cc:	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: Major network performance regression in 3.7

On Sun, 2013-01-06 at 18:35 +0100, Willy Tarreau wrote:

> Unfortunately it does not work any better, which means to me
> that we don't leave via this code path. I tried other tricks
> which failed too. I need to understand this part better before
> randomly fiddling with it.
> 

OK, now I have your test program, I can work on a fix, dont worry ;)

The MSG_SENDPAGE_NOTLAST logic needs to be tweaked.


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