netdev - RE: [PATCH v12 06/17] Use callback to deal with skb_release

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Message-ID: <F2E9EB7348B8264F86B6AB8151CE2D793064B2AC43@shsmsx502.ccr.corp.intel.com>
Date:	Tue, 12 Oct 2010 09:24:48 +0800
From:	"Xin, Xiaohui" <xiaohui.xin@...el.com>
To:	Eric Dumazet <eric.dumazet@...il.com>,
	David Miller <davem@...emloft.net>
CC:	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"kvm@...r.kernel.org" <kvm@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"mst@...hat.com" <mst@...hat.com>, "mingo@...e.hu" <mingo@...e.hu>,
	"herbert@...dor.apana.org.au" <herbert@...dor.apana.org.au>,
	"jdike@...ux.intel.com" <jdike@...ux.intel.com>
Subject: RE: [PATCH v12 06/17] Use callback to deal with skb_release_data()
 specially.

>-----Original Message-----
>From: Eric Dumazet [mailto:eric.dumazet@...il.com]
>Sent: Monday, October 11, 2010 11:42 PM
>To: David Miller
>Cc: Xin, Xiaohui; netdev@...r.kernel.org; kvm@...r.kernel.org;
>linux-kernel@...r.kernel.org; mst@...hat.com; mingo@...e.hu;
>herbert@...dor.apana.org.au; jdike@...ux.intel.com
>Subject: Re: [PATCH v12 06/17] Use callback to deal with skb_release_data() specially.
>
>Le lundi 11 octobre 2010 à 08:27 -0700, David Miller a écrit :
>> From: "Xin, Xiaohui" <xiaohui.xin@...el.com>
>> Date: Mon, 11 Oct 2010 15:06:05 +0800
>>
>> > That's to avoid the new cache miss caused by using destructor_arg in data path
>> > like skb_release_data().
>> > That's based on the comment from Eric Dumazet on v7 patches.
>>
>> Thanks for the explanation.
>
>Anyway, frags[] must be the last field of "struct skb_shared_info"
>since commit fed66381 (net: pskb_expand_head() optimization)
>
>It seems Xin worked on a quite old tree.
>
>
I will rebase soon.

Thanks
Xiaohui
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