From: Rik van Riel <riel@redhat.com>
To: Mel Gorman <mgorman@suse.de>
Cc: Thorsten Leemhuis <fedora@leemhuis.info>,
Jiri Slaby <jslaby@suse.cz>,
Valdis.Kletnieks@vt.edu, Jiri Slaby <jirislaby@gmail.com>,
linux-mm@kvack.org, LKML <linux-kernel@vger.kernel.org>,
Andrew Morton <akpm@linux-foundation.org>
Subject: Re: kswapd0: excessive CPU usage
Date: Sun, 04 Nov 2012 11:36:47 -0500 [thread overview]
Message-ID: <5096999F.1040405@redhat.com> (raw)
In-Reply-To: <20121030191843.GH3888@suse.de>
On 10/30/2012 03:18 PM, Mel Gorman wrote:
> restart:
> - wake_all_kswapd(order, zonelist, high_zoneidx,
> + /*
> + * kswapd is woken except when this is a THP request and compaction
> + * is deferred. If we are backing off reclaim/compaction then kswapd
> + * should not be awake aggressively reclaiming with no consumers of
> + * the freed pages
> + */
> + if (!(is_thp_alloc(gfp_mask, order) &&
> + compaction_deferred(preferred_zone, order)))
> + wake_all_kswapd(order, zonelist, high_zoneidx,
> zone_idx(preferred_zone));
What is special about thp allocations here?
Surely other large allocations that keep failing
should get the same treatment, of not waking up
kswapd if compaction is deferred?
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next prev parent reply other threads:[~2012-11-04 16:34 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-11 8:52 kswapd0: wxcessive CPU usage Jiri Slaby
2012-10-11 13:44 ` Valdis.Kletnieks
2012-10-11 15:34 ` Jiri Slaby
2012-10-11 17:56 ` Valdis.Kletnieks
2012-10-11 17:59 ` Jiri Slaby
2012-10-11 18:19 ` Valdis.Kletnieks
2012-10-11 22:08 ` kswapd0: excessive " Jiri Slaby
2012-10-12 12:37 ` Jiri Slaby
2012-10-12 13:57 ` Mel Gorman
2012-10-15 9:54 ` Jiri Slaby
2012-10-15 11:09 ` Mel Gorman
2012-10-29 10:52 ` Thorsten Leemhuis
2012-10-30 19:18 ` Mel Gorman
2012-10-31 11:25 ` Thorsten Leemhuis
2012-10-31 15:04 ` Mel Gorman
2012-11-04 16:36 ` Rik van Riel [this message]
2012-11-02 10:44 ` Zdenek Kabelac
2012-11-02 10:53 ` Jiri Slaby
2012-11-02 19:45 ` Jiri Slaby
2012-11-04 11:26 ` Zdenek Kabelac
2012-11-05 14:24 ` [PATCH] Revert "mm: vmscan: scale number of pages reclaimed by reclaim/compaction based on failures" Mel Gorman
2012-11-06 10:15 ` Johannes Hirte
2012-11-09 8:36 ` Mel Gorman
2012-11-14 21:43 ` Johannes Hirte
2012-11-09 9:12 ` Mel Gorman
2012-11-09 4:22 ` kswapd0: excessive CPU usage Seth Jennings
2012-11-09 8:07 ` Zdenek Kabelac
2012-11-09 9:06 ` Mel Gorman
2012-11-11 9:13 ` Zdenek Kabelac
2012-11-12 11:37 ` [PATCH] Revert "mm: remove __GFP_NO_KSWAPD" Mel Gorman
2012-11-16 19:14 ` Josh Boyer
2012-11-16 19:51 ` Andrew Morton
2012-11-20 1:43 ` Valdis.Kletnieks
2012-11-16 20:06 ` Mel Gorman
2012-11-20 15:38 ` Josh Boyer
2012-11-20 16:13 ` Bruno Wolff III
2012-11-20 17:43 ` Thorsten Leemhuis
2012-11-23 15:20 ` Thorsten Leemhuis
2012-11-27 11:12 ` Mel Gorman
2012-11-21 15:08 ` Mel Gorman
2012-11-20 9:18 ` Glauber Costa
2012-11-20 20:18 ` Andrew Morton
2012-11-21 8:30 ` Glauber Costa
2012-11-12 12:19 ` kswapd0: excessive CPU usage Mel Gorman
2012-11-12 13:13 ` Zdenek Kabelac
2012-11-12 13:31 ` Mel Gorman
2012-11-12 14:50 ` Zdenek Kabelac
2012-11-18 19:00 ` Zdenek Kabelac
2012-11-18 19:07 ` Jiri Slaby
2012-11-09 8:40 ` Mel Gorman
2012-10-11 22:14 ` kswapd0: wxcessive " Andrew Morton
2012-10-11 22:26 ` Jiri Slaby
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