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

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Message-ID: <20091114025135.GA19289@gondor.apana.org.au>
Date:	Sat, 14 Nov 2009 10:51:35 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Stephen Hemminger <shemminger@...tta.com>
Cc:	Gregory Haskins <gregory.haskins@...il.com>,
	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 06:45:03PM -0800, Stephen Hemminger wrote:
> 
> No all the interfaces require a copy. Actually, sendfile makes no guarantee about synchronization

Actually sendfile does not require a copy.

> because the receiver of said file could be arbitrarily slow, and any attempt at locking down
> current contents of file is a denial of service exposure.

Agreed.

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