netdev - Re: Major network performance regression in 3.7

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Date:	Sat, 05 Jan 2013 16:02:03 -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 00:29 +0100, Willy Tarreau wrote:

> > 2) Another possibility would be that Myri card/driver doesnt like very
> > well high order pages.
> 
> It looks like it has not changed much since 3.6 :-/ I really suspect
> something is wrong with memory allocation. I have tried reverting many
> patches affecting the mm/ directory just in case but I did not come to
> anything useful yet.
> 

Hmm, I was referring to TCP stack now using order-3 pages instead of
order-0 ones

See commit 5640f7685831e088fe6c2e1f863a6805962f8e81
(net: use a per task frag allocator)

Could you please post :

ethtool -S eth0



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