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From: Andi Kleen <andi@firstfloor.org>
To: Pekka Enberg <penberg@cs.helsinki.fi>
Cc: Andi Kleen <andi@firstfloor.org>,
	Vegard Nossum <vegard.nossum@gmail.com>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Ingo Molnar <mingo@elte.hu>,
	Richard Knutsson <ricknu-0@student.ltu.se>,
	Christoph Lameter <clameter@sgi.com>
Subject: Re: [PATCH 1/2] kmemcheck v3
Date: Fri, 8 Feb 2008 13:15:50 +0100	[thread overview]
Message-ID: <20080208121550.GG4745@one.firstfloor.org> (raw)
In-Reply-To: <84144f020802080337h5179210era890cf9b4e19c35@mail.gmail.com>

On Fri, Feb 08, 2008 at 01:37:11PM +0200, Pekka Enberg wrote:
> Hi Andi,
> 
> On Feb 8, 2008 1:55 PM, Andi Kleen <andi@firstfloor.org> wrote:
> > Also i'm not sure how you handle initializedness of DMAed data
> > (like network buffers). Wouldn't you need hooks into pci_dma_*
> > for this?
> 
> If the DMA'd memory is allocated from the page allocator, we don't

RX Network packets are usually allocated with kmalloc

Undoubtedly there are others too, e.g. USB comes to mind.

> need to worry about it just yet. In case it's from kmalloc() you can
> pass __GFP_NOTRACK to annotate those call sites where the memory is

Ok you should add that then to skbuff.c. 

-Andi

  reply	other threads:[~2008-02-08 11:40 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-02-07 21:36 Vegard Nossum
2008-02-07 21:39 ` [PATCH 2/2] " Vegard Nossum
2008-02-07 21:53 ` [PATCH 1/2] " Christoph Lameter
2008-02-07 22:12   ` Vegard Nossum
2008-02-07 22:53     ` Christoph Lameter
2008-02-07 23:18       ` Vegard Nossum
2008-02-07 23:32         ` Christoph Lameter
2008-02-08  6:40           ` Pekka Enberg
2008-02-08  8:09             ` Ingo Molnar
2008-02-08  6:30       ` Pekka Enberg
2008-02-08  6:33         ` Pekka Enberg
2008-02-08  7:10 ` Christoph Lameter
2008-02-08  7:48   ` Pekka Enberg
2008-02-08 11:55 ` Andi Kleen
2008-02-08 11:31   ` Pekka Enberg
2008-02-08 12:10     ` Andi Kleen
2008-02-08 11:39       ` Pekka Enberg
2008-02-08 11:37   ` Pekka Enberg
2008-02-08 12:15     ` Andi Kleen [this message]
2008-02-08 11:43       ` Pekka Enberg
2008-02-08 12:18   ` Vegard Nossum
2008-02-08 13:20     ` Andi Kleen
2008-02-08 12:59       ` Vegard Nossum
2008-02-08 13:48         ` Andi Kleen
2008-02-09  9:33           ` Ingo Molnar

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