From mboxrd@z Thu Jan  1 00:00:00 1970
From: Pekka Enberg <penberg@cs.helsinki.fi>
Subject: Re: [PATCH v3] ad7877: keep dma rx buffers in seperate cache lines
Date: Tue, 11 May 2010 21:59:29 +0300
Message-ID: <4BE9A911.1090203@cs.helsinki.fi>
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To: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: Mike Frysinger <vapier.adi@gmail.com>, Andrew Morton <akpm@linux-foundation.org>, Oskar Schirmer <os@emlix.com>, Michael Hennerich <Michael.Hennerich@analog.com>, linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, =?ISO-8859-1?Q?Daniel_Gl=F6ckner?= <dg@emlix.com>, Oliver Schneidewind <osw@emlix.com>, Johannes Weiner <jw@emlix.com>, Christoph Lameter <cl@linux-foundation.org>, Nick Piggin <npiggin@suse.de>, David Rientjes <rientjes@google.com>, Matt Mackall <mpm@selenic.com>
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Dmitry Torokhov wrote:
> The architectures that we are trying to deal with here should be forcing
> kmalloc to the cache boundary already though - otherwise they would not
> be able to used kmalloced memory for DMA buffers at all. Or am I utterly
> lost here?

I don't know which architecture you're talking about but it's not true 
in general and you probably don't want to depend on it even if it 
happens to work now.