netdev - Re: getting warn once around skb_try

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Date:	Tue, 10 Jul 2012 12:18:30 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Or Gerlitz <ogerlitz@...lanox.com>
Cc:	David Miller <davem@...emloft.net>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	Shlomo Pongratz <shlomop@...lanox.com>,
	Erez Shitrit <erezsh@...lanox.com>
Subject: Re: getting warn once around skb_try_coalesce

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.



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