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Date: Wed, 23 Nov 2011 15:15:57 -0800 (PST)
From: David Rientjes <rientjes@google.com>
Subject: Re: slub: use irqsafe_cpu_cmpxchg for put_cpu_partial
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To: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>, Christian Kujau <lists@nerdbynature.de>, Benjamin Herrenschmidt <benh@kernel.crashing.org>, Eric Dumazet <eric.dumazet@gmail.com>, Markus Trippelsdorf <markus@trippelsdorf.de>, "Alex,Shi" <alex.shi@intel.com>, linux-kernel@vger.kernel.org, linux-mm@kvack.org, Matt Mackall <mpm@selenic.com>, netdev@vger.kernel.org, Tejun Heo <tj@kernel.org>

On Wed, 23 Nov 2011, Christoph Lameter wrote:

> Subject: slub: use irqsafe_cpu_cmpxchg for put_cpu_partial
> 
> The cmpxchg must be irq safe. The fallback for this_cpu_cmpxchg only
> disables preemption which results in per cpu partial page operation
> potentially failing on non x86 platforms.
> 
> Signed-off-by: Christoph Lameter <cl@linux.com>

Acked-by: David Rientjes <rientjes@google.com>

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