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Date: Tue, 10 Jul 2007 11:01:43 +0200
From: "=?ISO-8859-1?Q?H=E5vard_Skinnemoen?=" <hskinnemoen@gmail.com>
To: "Matt Mackall" <mpm@selenic.com>
Subject: Re: [patch 09/10] Remove the SLOB allocator for 2.6.23
Cc: "Christoph Lameter" <clameter@sgi.com>,
       "Nick Piggin" <nickpiggin@yahoo.com.au>,
       "Andrew Morton" <akpm@linux-foundation.org>,
       "Ingo Molnar" <mingo@elte.hu>, linux-kernel@vger.kernel.org,
       linux-mm@vger.kernel.org, suresh.b.siddha@intel.com,
       corey.d.gough@intel.com, "Pekka Enberg" <penberg@cs.helsinki.fi>,
       "Denis Vlasenko" <vda.linux@googlemail.com>,
       "Erik Andersen" <andersen@codepoet.org>
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On 7/10/07, Matt Mackall <mpm@selenic.com> wrote:
> The only remaining known bug is arguably a problem in nommu that SLOB
> shouldn't be papering over.

I've got another one for you: SLOB ignores ARCH_KMALLOC_MINALIGN so
using SLOB in combination with DMA and non-coherent architectures
causes data corruption.

That said, there are currently very few architectures that define
ARCH_KMALLOC_MINALIGN, so I guess it might be something I'm doing
wrong on avr32. But I'd really like to know how other non-coherent
architectures handle DMA to buffers sharing cachelines with unrelated
data...

Håvard