linux-kernel - Re: hackbench regression due to commit 9dfc6e68bfe6e

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Message-ID: <alpine.DEB.2.00.1004071319320.16159@router.home>
Date:	Wed, 7 Apr 2010 13:20:45 -0500 (CDT)
From:	Christoph Lameter <cl@...ux-foundation.org>
To:	Pekka Enberg <penberg@...helsinki.fi>
cc:	"Zhang, Yanmin" <yanmin_zhang@...ux.intel.com>,
	Eric Dumazet <eric.dumazet@...il.com>,
	netdev <netdev@...r.kernel.org>, Tejun Heo <tj@...nel.org>,
	alex.shi@...el.com,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Ma, Ling" <ling.ma@...el.com>,
	"Chen, Tim C" <tim.c.chen@...el.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: hackbench regression due to commit 9dfc6e68bfe6e

On Wed, 7 Apr 2010, Pekka Enberg wrote:

> Oh, sorry, I think it's actually '____cacheline_aligned_in_smp' (with four
> underscores) for per-cpu data. Confusing...

This does not particulary help to clarify the situation since we are
dealing with data that can either be allocated via the percpu allocator or
be statically present (kmalloc bootstrap situation).

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