From: Nick Piggin <nickpiggin@yahoo.com.au>
To: miaox@cn.fujitsu.com
Cc: Ingo Molnar <mingo@elte.hu>,
Andrew Morton <akpm@linux-foundation.org>,
Paul Menage <menage@google.com>,
"Linux-Kernel" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] cpuset: fix allocating page cache/slab object on the unallowed node when memory spread is set
Date: Wed, 21 Jan 2009 19:30:26 +1100 [thread overview]
Message-ID: <200901211930.27178.nickpiggin@yahoo.com.au> (raw)
In-Reply-To: <4976D77C.3020107@cn.fujitsu.com>
On Wednesday 21 January 2009 19:06:20 Miao Xie wrote:
> The task still allocated the page caches on old node after modifying its
> cpuset's mems when 'memory_spread_page' was set, it is caused by the old
> mem_allowed_list of the task, the current kernel doesn't updates it unless
> some function invokes cpuset_update_task_memory_state(), it is too late
> sometimes. We must update the mem_allowed_list of the tasks in time.
>
> Slab has the same problem.
>
> We fixes the bug by updating tasks' mem_allowed_list and spread flag after
> its cpuset's mems or spread flag is changed.
Thank you, this is a much better way to handle the problem, and keeps
those costly function calls out of fastpaths.
I don't know the cpuset code well enough to review it right now, but
the mm/ pieces thank you kindly for it :) Nice patch.
next prev parent reply other threads:[~2009-01-21 8:31 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-01-21 8:06 Miao Xie
2009-01-21 8:30 ` Nick Piggin [this message]
2009-01-21 10:41 ` Paul Menage
2009-02-03 3:05 ` Miao Xie
2009-01-27 22:42 ` Andrew Morton
2009-01-28 16:38 ` Christoph Lameter
2009-02-03 3:25 ` Miao Xie
2009-02-03 22:16 ` Andrew Morton
2009-02-03 22:49 ` Paul Menage
2009-02-04 9:31 ` Miao Xie
2009-02-06 19:19 ` Paul Menage
2009-02-09 4:02 ` Nick Piggin
2009-02-10 11:37 ` Paul Menage
2009-02-12 0:54 ` Nick Piggin
2009-02-12 1:19 ` Paul Menage
2009-02-12 1:55 ` Nick Piggin
2009-02-12 1:58 ` Paul Menage
2009-02-12 8:23 ` Miao Xie
2009-02-12 21:53 ` Paul Menage
2009-02-12 8:27 ` Miao Xie
2009-02-12 10:40 ` Nick Piggin
2009-02-12 5:57 ` Miao Xie
2009-02-12 11:06 ` Paul Jackson
2009-02-04 9:03 ` Miao Xie
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