linux-kernel - Re: Reading /proc/slabinfo causes stalls

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Date:	Tue, 16 Oct 2012 11:47:58 -0700 (PDT)
From:	David Rientjes <rientjes@...gle.com>
To:	Christoph Lameter <cl@...ux.com>
cc:	Pekka Enberg <penberg@...nel.org>, Avleen Vig <avleen@...il.com>,
	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: Reading /proc/slabinfo causes stalls

On Tue, 16 Oct 2012, Christoph Lameter wrote:

> If the allocator is SLAB then I would think that this is a stall of
> slabinfo mutex vs. slab clean operations (gets more frequent the more
> processors are in the box).
> 
> If this is the case then using the SLUB allocator will fix the issue since
> SLUB does not need to perform cache cleaning.
> 

Or convert slab_mutex to be a rwlock?
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