netdev - Re: Data corruption issue with splice() on 2.6.27.10

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Message-ID: <20090107130031.GD6307@1wt.eu>
Date:	Wed, 7 Jan 2009 14:00:31 +0100
From:	Willy Tarreau <w@....eu>
To:	Herbert Xu <herbert@...dor.apana.org.au>
Cc:	Jarek Poplawski <jarkao2@...il.com>,
	Jens Axboe <jens.axboe@...cle.com>,
	Changli Gao <xiaosuo@...il.com>,
	Evgeniy Polyakov <zbr@...emap.net>,
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: Data corruption issue with splice() on 2.6.27.10

On Wed, Jan 07, 2009 at 11:52:17PM +1100, Herbert Xu wrote:
> On Wed, Jan 07, 2009 at 12:49:46PM +0000, Jarek Poplawski wrote:
> > 
> > Hmm... in any case: take 3
> 
> Yes this should fix the corruption but it kind of defeats the
> purpose of splice by copying the data.

that's what I was initially wondering about, but it looks like only linear
data is copied. Will that cause too much a overhead ? (I don't like copying
at all anyway, but if it can help us find the cause, I'll happily test it).

BTW, Jarek, don't be sorry, I *am* expecting to crash my laptop a number of
times before ensuring the bug is fixed. I just don't want to lose my data.

Cheers,
Willy

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