From: Rik van Riel <riel@surriel.com>
To: Johannes Weiner <hannes@cmpxchg.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Mel Gorman <mgorman@suse.de>,
Andrea Arcangeli <aarcange@redhat.com>,
Zlatko Calusic <zcalusic@bitsync.net>,
Minchan Kim <minchan@kernel.org>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [patch v2 3/3] mm: page_alloc: fair zone allocator policy
Date: Fri, 02 Aug 2013 13:51:54 -0400 [thread overview]
Message-ID: <51FBF1BA.9030801@surriel.com> (raw)
In-Reply-To: <1375457846-21521-4-git-send-email-hannes@cmpxchg.org>
On 08/02/2013 11:37 AM, Johannes Weiner wrote:
> Each zone that holds userspace pages of one workload must be aged at a
> speed proportional to the zone size. Otherwise, the time an
> individual page gets to stay in memory depends on the zone it happened
> to be allocated in. Asymmetry in the zone aging creates rather
> unpredictable aging behavior and results in the wrong pages being
> reclaimed, activated etc.
> When zone_reclaim_mode is enabled, allocations will now spread out to
> all zones on the local node, not just the first preferred zone (which
> on a 4G node might be a tiny Normal zone).
>
> Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
> Tested-by: Zlatko Calusic <zcalusic@bitsync.net>
Reviewed-by: Rik van Riel <riel@redhat.com>
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WARNING: multiple messages have this Message-ID (diff)
From: Rik van Riel <riel@surriel.com>
To: Johannes Weiner <hannes@cmpxchg.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Mel Gorman <mgorman@suse.de>,
Andrea Arcangeli <aarcange@redhat.com>,
Zlatko Calusic <zcalusic@bitsync.net>,
Minchan Kim <minchan@kernel.org>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [patch v2 3/3] mm: page_alloc: fair zone allocator policy
Date: Fri, 02 Aug 2013 13:51:54 -0400 [thread overview]
Message-ID: <51FBF1BA.9030801@surriel.com> (raw)
In-Reply-To: <1375457846-21521-4-git-send-email-hannes@cmpxchg.org>
On 08/02/2013 11:37 AM, Johannes Weiner wrote:
> Each zone that holds userspace pages of one workload must be aged at a
> speed proportional to the zone size. Otherwise, the time an
> individual page gets to stay in memory depends on the zone it happened
> to be allocated in. Asymmetry in the zone aging creates rather
> unpredictable aging behavior and results in the wrong pages being
> reclaimed, activated etc.
> When zone_reclaim_mode is enabled, allocations will now spread out to
> all zones on the local node, not just the first preferred zone (which
> on a 4G node might be a tiny Normal zone).
>
> Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
> Tested-by: Zlatko Calusic <zcalusic@bitsync.net>
Reviewed-by: Rik van Riel <riel@redhat.com>
--
All rights reversed.
next prev parent reply other threads:[~2013-08-02 17:52 UTC|newest]
Thread overview: 82+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-08-02 15:37 [patch v2 0/3] mm: improve page aging fairness between zones/nodes Johannes Weiner
2013-08-02 15:37 ` Johannes Weiner
2013-08-02 15:37 ` [patch v2 1/3] mm: vmscan: fix numa reclaim balance problem in kswapd Johannes Weiner
2013-08-02 15:37 ` Johannes Weiner
2013-08-07 14:15 ` Mel Gorman
2013-08-07 14:15 ` Mel Gorman
2013-08-02 15:37 ` [patch v2 2/3] mm: page_alloc: rearrange watermark checking in get_page_from_freelist Johannes Weiner
2013-08-02 15:37 ` Johannes Weiner
2013-08-07 14:20 ` Mel Gorman
2013-08-07 14:20 ` Mel Gorman
2013-08-02 15:37 ` [patch v2 3/3] mm: page_alloc: fair zone allocator policy Johannes Weiner
2013-08-02 15:37 ` Johannes Weiner
2013-08-02 17:51 ` Rik van Riel [this message]
2013-08-02 17:51 ` Rik van Riel
2013-08-05 1:15 ` Minchan Kim
2013-08-05 1:15 ` Minchan Kim
2013-08-05 3:43 ` Johannes Weiner
2013-08-05 3:43 ` Johannes Weiner
2013-08-05 4:48 ` Minchan Kim
2013-08-05 4:48 ` Minchan Kim
2013-08-05 5:01 ` Johannes Weiner
2013-08-05 5:01 ` Johannes Weiner
2013-08-05 10:34 ` Wanpeng Li
2013-08-05 10:34 ` Wanpeng Li
2013-08-05 11:34 ` Andrea Arcangeli
2013-08-05 11:34 ` Andrea Arcangeli
2013-08-05 13:11 ` Wanpeng Li
2013-08-05 13:11 ` Wanpeng Li
2013-08-07 14:58 ` Mel Gorman
2013-08-07 14:58 ` Mel Gorman
2013-08-07 15:37 ` Johannes Weiner
2013-08-07 15:37 ` Johannes Weiner
2013-08-08 4:16 ` Johannes Weiner
2013-08-08 4:16 ` Johannes Weiner
2013-08-08 9:21 ` Mel Gorman
2013-08-08 9:21 ` Mel Gorman
2013-08-09 18:45 ` Rik van Riel
2013-08-09 18:45 ` Rik van Riel
2013-08-16 17:07 ` Kevin Hilman
2013-08-16 17:17 ` Kevin Hilman
2013-08-16 20:18 ` Johannes Weiner
2013-08-16 20:18 ` Johannes Weiner
2013-08-16 20:18 ` Johannes Weiner
2013-08-16 21:24 ` Stephen Warren
2013-08-16 21:24 ` Stephen Warren
2013-08-16 21:24 ` Stephen Warren
2013-08-16 21:52 ` Kevin Hilman
2013-08-16 21:52 ` Kevin Hilman
2013-08-16 21:52 ` Kevin Hilman
2013-08-19 0:48 ` Stephen Rothwell
2013-08-19 0:48 ` Stephen Rothwell
2014-04-02 14:26 ` Thomas Schwinge
2014-04-02 14:26 ` Thomas Schwinge
2014-04-24 13:37 ` radeon: screen garbled after page allocator change, was: " Johannes Weiner
2014-04-24 13:37 ` Johannes Weiner
2014-04-24 13:37 ` Johannes Weiner
2014-04-25 21:47 ` Jerome Glisse
2014-04-25 21:47 ` Jerome Glisse
2014-04-25 21:47 ` Jerome Glisse
2014-04-25 21:50 ` Jerome Glisse
2014-04-25 21:50 ` Jerome Glisse
2014-04-25 23:03 ` Jerome Glisse
2014-04-25 23:03 ` Jerome Glisse
2014-04-25 23:03 ` Jerome Glisse
2014-04-28 8:03 ` Thomas Schwinge
2014-04-28 9:09 ` Thomas Schwinge
2014-04-27 3:31 ` Jerome Glisse
2014-04-27 3:31 ` Jerome Glisse
2014-04-27 3:31 ` Jerome Glisse
2014-04-27 19:55 ` Jerome Glisse
2014-04-27 19:55 ` Jerome Glisse
2014-04-27 19:55 ` Jerome Glisse
2014-04-28 7:30 ` Christian König
2014-04-28 7:30 ` Christian König
2014-04-28 12:51 ` Deucher, Alexander
2014-04-28 12:51 ` Deucher, Alexander
2014-04-28 12:52 ` Deucher, Alexander
2014-04-28 12:52 ` Deucher, Alexander
2014-04-28 8:09 ` Thomas Schwinge
2014-06-16 7:11 ` Thomas Schwinge
2013-08-02 19:59 ` [patch v2 0/3] mm: improve page aging fairness between zones/nodes Andrea Arcangeli
2013-08-02 19:59 ` Andrea Arcangeli
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