linux-kernel - Re: [PATCH] - Improve drain pages performance on large systems

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Message-ID: <m262skx26v.fsf@firstfloor.org>
Date:	Tue, 15 Feb 2011 16:17:44 -0800
From:	Andi Kleen <andi@...stfloor.org>
To:	Jack Steiner <steiner@....com>
Cc:	linux-mm@...ck.org, akpm@...ux-foundation.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] - Improve drain pages performance on large systems

Jack Steiner <steiner@....com> writes:

> Heavy swapping within a cpuset causes frequent calls to drain_all_pages().

I suspect drain_all_pages should be really made more zone aware in the
first place and only drain what is actually needed (e.g.
work off a zonelist). I was fighting with this for hwpoison too.

That said your patch looks reasonable.

-Andi

-- 
ak@...ux.intel.com -- Speaking for myself only
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