From: Peter Zijlstra <peterz@infradead.org>
To: Wu Fengguang <fengguang.wu@intel.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
Minchan Kim <minchan.kim@gmail.com>,
Johannes Weiner <hannes@cmpxchg.org>,
David Howells <dhowells@redhat.com>,
"riel@redhat.com" <riel@redhat.com>,
Andrew Morton <akpm@linux-foundation.org>,
LKML <linux-kernel@vger.kernel.org>,
Christoph Lameter <cl@linux-foundation.org>,
"tytso@mit.edu" <tytso@mit.edu>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
"elladan@eskimo.com" <elladan@eskimo.com>,
"npiggin@suse.de" <npiggin@suse.de>,
"Barnes, Jesse" <jesse.barnes@intel.com>
Subject: Re: [PATCH] mm: count only reclaimable lru pages
Date: Thu, 16 Jul 2009 15:40:51 +0200 [thread overview]
Message-ID: <1247751651.6586.17.camel@laptop> (raw)
In-Reply-To: <20090716133454.GA20550@localhost>
On Thu, 2009-07-16 at 21:34 +0800, Wu Fengguang wrote:
> global_lru_pages() / zone_lru_pages() can be used in two ways:
> - to estimate max reclaimable pages in determine_dirtyable_memory()
> - to calculate the slab scan ratio
>
> When swap is full or not present, the anon lru lists are not reclaimable
> and thus won't be scanned. So the anon pages shall not be counted. Also
> rename the function names to reflect the new meaning.
>
> It can greatly (and correctly) increase the slab scan rate under high memory
> pressure (when most file pages have been reclaimed and swap is full/absent),
> thus avoid possible false OOM kills.
>
> Cc: Minchan Kim <minchan.kim@gmail.com>
> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
> Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
Makes sense.
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
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next prev parent reply other threads:[~2009-07-16 13:41 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-07-16 13:34 [PATCH] mm: count only reclaimable lru pages Wu Fengguang
2009-07-16 13:40 ` Peter Zijlstra [this message]
2009-07-16 13:49 ` Rik van Riel
2009-07-16 14:00 ` Christoph Lameter
2009-07-16 14:25 ` Wu Fengguang
2009-07-16 14:28 ` Peter Zijlstra
2009-07-16 14:39 ` Christoph Lameter
2009-07-16 14:42 ` Rik van Riel
2009-07-16 15:09 ` [PATCH] mm: count only reclaimable lru pages v2 Wu Fengguang
2009-07-16 15:59 ` Johannes Weiner
2009-07-16 16:21 ` Christoph Lameter
2009-07-16 23:53 ` KOSAKI Motohiro
2009-07-16 14:17 ` [PATCH] mm: count only reclaimable lru pages Minchan Kim
2009-07-16 16:15 ` David Howells
2009-07-16 16:24 ` Rik van Riel
2009-07-16 17:11 ` David Howells
2009-07-16 18:51 ` Li, Ming Chun
2009-07-17 4:57 ` KOSAKI Motohiro
2009-07-17 6:32 ` Li, Ming Chun
2009-07-16 16:21 ` Jesse Barnes
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