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
next prev parent 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 [PATCH 1/2] kmemcheck v3 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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