netdev - Re: [RFC PATCH] net: add dataref destructor to sk

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Message-ID: <20091114022103.GA19020@gondor.apana.org.au>
Date:	Sat, 14 Nov 2009 10:21:03 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Gregory Haskins <gregory.haskins@...il.com>
Cc:	Gregory Haskins <ghaskins@...ell.com>,
	"Michael S. Tsirkin" <mst@...hat.com>,
	alacrityvm-devel@...ts.sourceforge.net,
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [RFC PATCH] net: add dataref destructor to sk_buff

On Fri, Nov 13, 2009 at 08:33:35PM -0500, Gregory Haskins wrote:
>
> Well, not with respect to the overall protocol, of course not.  But with
> respect to the buffer in question, it _has_ to be.  Or am I missing
> something?

sendfile() has never guaranteed that the kernel is finished with
the underlying pages when it returns.

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