netdev - Re: SW csum errors

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Message-ID: <1381937065.2045.131.camel@edumazet-glaptop.roam.corp.google.com>
Date:	Wed, 16 Oct 2013 08:24:25 -0700
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Kyle Hubert <khubert@...il.com>
Cc:	Stephen Hemminger <stephen@...workplumber.org>,
	netdev@...r.kernel.org
Subject: Re: SW csum errors

On Wed, 2013-10-16 at 11:10 -0400, Kyle Hubert wrote:

> Thanks, I didn't realize it was as simple as file backed pages being
> changed. Yes, our device does support SG, so we do have zero-copy
> sendfile() support. I'll concoct a simple test to prove this.

You also can use vmsplice()/splice() and touch anonymous memory,
no need to play with a file ;)



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