From: Andi Kleen <andi@firstfloor.org>
To: Dave Chinner <david@fromorbit.com>
Cc: John Lepikhin <johnlepikhin@gmail.com>,
linux-kernel@vger.kernel.org, xfs@oss.sgi.com,
linux-mm@kvack.org
Subject: Re: Very aggressive memory reclaim
Date: Mon, 28 Mar 2011 16:58:50 -0700 [thread overview]
Message-ID: <m2bp0u23wl.fsf@firstfloor.org> (raw)
In-Reply-To: <20110328215344.GC3008@dastard> (Dave Chinner's message of "Tue, 29 Mar 2011 08:53:44 +1100")
Dave Chinner <david@fromorbit.com> writes:
>
> First it would be useful to determine why the VM is reclaiming so
> much memory. If it is somewhat predictable when the excessive
> reclaim is going to happen, it might be worth capturing an event
Often it's to get pages of a higher order. Just tracing alloc_pages
should tell you that.
There are a few other cases (like memory failure handling), but they're
more obscure.
-Andi
--
ak@linux.intel.com -- Speaking for myself only
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next prev parent reply other threads:[~2011-03-29 0:00 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <AANLkTinFqqmE+fTMTLVU-_CwPE+LQv7CpXSQ5+CdAKLK@mail.gmail.com>
2011-03-28 21:53 ` Dave Chinner
2011-03-28 22:52 ` Minchan Kim
2011-03-29 2:55 ` KOSAKI Motohiro
2011-03-29 7:33 ` John Lepikhin
2011-03-29 7:22 ` John Lepikhin
2011-03-28 23:58 ` Andi Kleen [this message]
2011-03-29 1:57 ` Dave Chinner
2011-03-29 7:26 ` John Lepikhin
2011-03-29 8:59 ` Avi Kivity
[not found] ` <4D90C071.7040205@mnsu.edu>
[not found] ` <AANLkTikmQJFq633VNqNOMC-BfEC=BU=g7j5uW78P4B4Z@mail.gmail.com>
2011-03-30 13:48 ` Wu Fengguang
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