linux-kernel - Re: [PATCH v15 00/17] Provide a zero-copy method on KVM virtio-net.

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Message-Id: <20101109.091516.112581012.davem@davemloft.net>
Date:	Tue, 09 Nov 2010 09:15:16 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	xiaohui.xin@...el.com
Cc:	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 v15 00/17] Provide a zero-copy method on KVM virtio-net.

From: xiaohui.xin@...el.com
Date: Tue,  9 Nov 2010 17:03:05 +0800

> We provide an zero-copy method which driver side may get external
> buffers to DMA. Here external means driver don't use kernel space
> to allocate skb buffers. Currently the external buffer can be from
> guest virtio-net driver.

1) Please use kernel-doc style comments to document structure
   members.

2) The idea to key off of skb->dev in skb_release_data() is
   fundamentally flawed since many actions can change skb->dev on you,
   which will end up causing a leak of your external data areas.
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