From: Ben Dooks <ben-linux@fluff.org>
To: Stefan Richter <stefanr@s5r6.in-berlin.de>
Cc: linux-kernel@vger.kernel.org, Joerg Roedel <joerg.roedel@amd.com>
Subject: Re: dma-debug: check_for_stack background?
Date: Sun, 14 Jun 2009 22:20:18 +0100 [thread overview]
Message-ID: <20090614212018.GD20442@fluff.org.uk> (raw)
In-Reply-To: <4A3547DD.2010809@s5r6.in-berlin.de>
On Sun, Jun 14, 2009 at 08:56:29PM +0200, Stefan Richter wrote:
> Hi,
>
> it took a while but I finally noticed that the DMA debug facility warns
> about mappings of on-stack memory. What's the problem with that? Are
> there architectures which don't support such mappings, or is it a
> question of caution not to DMA-map the stack?
I'm not sure if it is possible on all architectures, however the
DMA mapping documentation prohibts the use of stack memory.
--
Ben (ben@fluff.org, http://www.fluff.org/)
'a smiley only costs 4 bytes'
next prev parent reply other threads:[~2009-06-14 21:20 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-06-14 18:56 dma-debug: check_for_stack background? Stefan Richter
2009-06-14 21:20 ` Ben Dooks [this message]
2009-06-14 21:43 ` Stefan Richter
2009-06-15 8:13 ` Joerg Roedel
2009-06-16 6:16 ` FUJITA Tomonori
2009-06-16 6:41 ` Ming Lei
2009-06-16 8:14 ` Joerg Roedel
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