From: Rik van Riel <riel@redhat.com>
To: Johannes Weiner <hannes@cmpxchg.org>
Cc: Andrew Morton <akpm@linux-foundation.org>, linux-mm@kvack.org
Subject: Re: [patch] mm: skip rebalance of hopeless zones
Date: Wed, 08 Dec 2010 13:05:59 -0500 [thread overview]
Message-ID: <4CFFC907.4090806@redhat.com> (raw)
In-Reply-To: <1291821419-11213-1-git-send-email-hannes@cmpxchg.org>
On 12/08/2010 10:16 AM, Johannes Weiner wrote:
> Kswapd tries to rebalance zones persistently until their high
> watermarks are restored.
>
> If the amount of unreclaimable pages in a zone makes this impossible
> for reclaim, though, kswapd will end up in a busy loop without a
> chance of reaching its goal.
>
> This behaviour was observed on a virtual machine with a tiny
> Normal-zone that filled up with unreclaimable slab objects.
>
> This patch makes kswapd skip rebalancing on such 'hopeless' zones and
> leaves them to direct reclaim.
>
> Signed-off-by: Johannes Weiner<hannes@cmpxchg.org>
Reviewed-by: Rik van Riel <riel@redhat.com>
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next prev parent reply other threads:[~2010-12-08 18:06 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-12-08 15:16 [patch] mm: skip rebalance of hopeless zones Johannes Weiner
2010-12-08 18:05 ` Rik van Riel [this message]
2010-12-08 22:19 ` Andrew Morton
2010-12-09 0:04 ` Johannes Weiner
2010-12-09 21:17 ` Andrew Morton
2010-12-10 16:27 ` Johannes Weiner
2011-01-05 11:15 ` Johannes Weiner
2011-01-04 23:56 ` Andrew Morton
2010-12-09 0:47 ` Rik van Riel
2010-12-09 14:34 ` Mel Gorman
2010-12-09 0:36 ` Simon Kirby
2010-12-09 0:49 ` Rik van Riel
2010-12-09 1:08 ` Simon Kirby
2010-12-09 14:42 ` Mel Gorman
2010-12-09 1:23 ` Andrew Morton
2010-12-09 1:55 ` Minchan Kim
2010-12-09 1:57 ` Minchan Kim
2010-12-09 2:01 ` Andrew Morton
2010-12-09 2:19 ` Minchan Kim
2010-12-09 5:18 ` Minchan Kim
2010-12-09 2:05 ` Simon Kirby
2010-12-09 8:55 ` Pekka Enberg
2010-12-09 14:46 ` Mel Gorman
2010-12-09 14:44 ` Mel Gorman
2010-12-09 18:03 ` Andrew Morton
2010-12-09 18:48 ` Ying Han
2010-12-10 11:34 ` Mel Gorman
2010-12-09 18:39 ` Ying Han
2010-12-10 11:37 ` Mel Gorman
2010-12-10 19:46 ` Ying Han
2010-12-09 1:29 ` Minchan Kim
2010-12-09 18:51 ` Ying Han
2010-12-10 7:25 ` KOSAKI Motohiro
2010-12-10 7:37 ` KOSAKI Motohiro
2010-12-10 10:54 ` Johannes Weiner
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