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From: Paul Menage <menage@google.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Christoph Lameter <cl@linux-foundation.org>,
	peterz@infradead.org, rientjes@google.com, npiggin@suse.de,
	dfults@sgi.com, linux-kernel@vger.kernel.org,
	containers@lists.osdl.org
Subject: Re: [patch 0/7] cpuset writeback throttling
Date: Wed, 5 Nov 2008 13:55:33 -0800	[thread overview]
Message-ID: <6599ad830811051355n5765a115mbd6eb389504d125d@mail.gmail.com> (raw)
In-Reply-To: <20081105125603.36d0c222.akpm@linux-foundation.org>

On Wed, Nov 5, 2008 at 12:56 PM, Andrew Morton
<akpm@linux-foundation.org> wrote:
>>
>> 1. Reduce the global dirty ratios so that the number of dirty pages in a
>> cpuset cannot become too high.
>
> That would be less than the smallest node's memory capacity, I guess.

Even that doesn't work - if there's a single global limit on dirty
pages, then any cpuset/cgroup with access to enough memory can exhaust
that limit and cause other processes to block when they try to write
to disk. You need independent dirty counts to avoid that, whether it
be per-node or per-cgroup.

Paul

  parent reply	other threads:[~2008-11-05 21:55 UTC|newest]

Thread overview: 45+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-10-30 19:23 David Rientjes
2008-10-30 19:23 ` [patch 1/7] cpusets: add dirty map to struct address_space David Rientjes
2008-11-04 21:09   ` Andrew Morton
2008-11-04 21:20     ` Christoph Lameter
2008-11-04 21:42       ` Andrew Morton
2008-10-30 19:23 ` [patch 2/7] pdflush: allow the passing of a nodemask parameter David Rientjes
2008-10-30 19:23 ` [patch 3/7] mm: make page writeback obey cpuset constraints David Rientjes
2008-10-30 19:23 ` [patch 4/7] mm: cpuset aware reclaim writeout David Rientjes
2008-10-30 19:23 ` [patch 5/7] mm: throttle writeout with cpuset awareness David Rientjes
2008-10-30 19:23 ` [patch 6/7] cpusets: per cpuset dirty ratios David Rientjes
2008-10-30 19:23 ` [patch 7/7] cpusets: update documentation for writeback throttling David Rientjes
2008-10-30 21:08 ` [patch 0/7] cpuset " Dave Chinner
2008-10-30 21:33   ` Christoph Lameter
2008-10-30 22:03     ` Dave Chinner
2008-10-31 13:47       ` Christoph Lameter
2008-10-31 16:36       ` David Rientjes
2008-11-04 20:47 ` Andrew Morton
2008-11-04 20:53   ` Peter Zijlstra
2008-11-04 20:58     ` Christoph Lameter
2008-11-04 21:10     ` David Rientjes
2008-11-04 21:16     ` Andrew Morton
2008-11-04 21:21       ` Peter Zijlstra
2008-11-04 21:50         ` Andrew Morton
2008-11-04 22:17           ` Christoph Lameter
2008-11-04 22:35             ` Andrew Morton
2008-11-04 22:52               ` Christoph Lameter
2008-11-04 23:36                 ` Andrew Morton
2008-11-05  1:31                   ` KAMEZAWA Hiroyuki
2008-11-05  3:09                     ` Andrew Morton
2008-11-05  2:45                   ` Christoph Lameter
2008-11-05  3:05                     ` Andrew Morton
2008-11-05  4:31                       ` KAMEZAWA Hiroyuki
2008-11-10  9:02                         ` Andrea Righi
2008-11-10 10:02                           ` David Rientjes
2008-11-05 13:52                       ` Christoph Lameter
2008-11-05 18:41                         ` Andrew Morton
2008-11-05 20:21                           ` Christoph Lameter
2008-11-05 20:31                             ` Andrew Morton
2008-11-05 20:40                               ` Christoph Lameter
2008-11-05 20:56                                 ` Andrew Morton
2008-11-05 21:28                                   ` Christoph Lameter
2008-11-05 21:55                                   ` Paul Menage [this message]
2008-11-05 22:04                                   ` David Rientjes
2008-11-06  1:34                                     ` KAMEZAWA Hiroyuki
2008-11-06 20:35                                       ` David Rientjes

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