From mboxrd@z Thu Jan  1 00:00:00 1970
From: Eric Dumazet <eric.dumazet@gmail.com>
Subject: Re: getting warn once around skb_try_coalesce
Date: Tue, 10 Jul 2012 12:18:30 +0200
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Cc: David Miller <davem@davemloft.net>,
	"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
	Shlomo Pongratz <shlomop@mellanox.com>,
	Erez Shitrit <erezsh@mellanox.com>
To: Or Gerlitz <ogerlitz@mellanox.com>
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On Tue, 2012-07-10 at 12:54 +0300, Or Gerlitz wrote:
> Hi Dave, Eric,
> 
> Another trace that I see here with net-next is this one-time warning. I 
> get it always
> on the passive side of TCP, something that seems related to GRO, it 
> happens only with
> IPoIB, not with mlx4_en and igb (when igb get to work on net-next...)
> 
> The latest commit in this area is bad43ca8325f493dcaa0896c2f036276af059c7e
> "net: introduce skb_try_coalesce()" from Eric.
> 
> Or.
> 
> -----------[ cut here ]------------
> WARNING: at net/core/skbuff.c:3413 skb_try_coalesce+0x1f8/0x31d()

This warning catch skb truesize offenders, most probably its a driver
issue.