Date: Wed, 7 Jan 2009 22:50:32 +1100
From: Herbert Xu <herbert@gondor.apana.org.au>
To: Evgeniy Polyakov <zbr@ioremap.net>
Cc: Jens Axboe <jens.axboe@oracle.com>, Willy Tarreau <w@1wt.eu>,
       linux-kernel@vger.kernel.org, netdev@vger.kernel.org
Subject: Re: Data corruption issue with splice() on 2.6.27.10
Message-ID: <20090107115032.GA25198@gondor.apana.org.au>
References: <20081224152841.GB13113@1wt.eu> <20090106183223.GA11964@ioremap.net> <20090106183704.GC32491@kernel.dk> <20090107044232.GA22218@gondor.apana.org.au> <20090107112906.GA28161@ioremap.net>
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On Wed, Jan 07, 2009 at 02:29:06PM +0300, Evgeniy Polyakov wrote:
>
> That would not happen without scatter-gather support on the interface,
> date would be plain copied, and after Jarek's requst Willy confirmed
> that corruption happens with all acceleration being turned off.

It will happen without scatter-gather support.  The problem
is with skb->head, which is always there.  In any case, SG can't
make any difference because the skb is an inbound one and most
drivers only produce linear packets.

Cheers,
-- 
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Email: Herbert Xu ~{PmV>HI~} <herbert@gondor.apana.org.au>
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