From: Mel Gorman <mgorman@suse.de>
To: Andrea Arcangeli <aarcange@redhat.com>
Cc: linux-mm@kvack.org, Rik van Riel <riel@redhat.com>,
Hugh Dickins <hughd@google.com>,
Richard Davies <richard@arachsys.com>,
Shaohua Li <shli@kernel.org>, Rafael Aquini <aquini@redhat.com>
Subject: Re: [PATCH 5/7] mm: compaction: increase the high order pages in the watermarks
Date: Thu, 6 Jun 2013 10:19:10 +0100 [thread overview]
Message-ID: <20130606091910.GG1936@suse.de> (raw)
In-Reply-To: <1370445037-24144-6-git-send-email-aarcange@redhat.com>
On Wed, Jun 05, 2013 at 05:10:35PM +0200, Andrea Arcangeli wrote:
> Require more high order pages in the watermarks, to give more margin
> for concurrent allocations. If there are too few pages, they can
> disappear too soon.
>
> Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
This seems to be special casing THP allocations to allow it to relax the
watermark requirements. FWIW, I have seen cases where hugepage
allocations fail even though there are pages free becase memory is low
overall. It was very marginal though in terms of overall success rates
but that was also a long time ago when I was checking. How much of a
difference did you see with this patch?
--
Mel Gorman
SUSE Labs
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next prev parent reply other threads:[~2013-06-06 9:19 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-05 15:10 [PATCH 0/7] RFC: adding compaction to zone_reclaim_mode > 0 Andrea Arcangeli
2013-06-05 15:10 ` [PATCH 1/7] mm: remove ZONE_RECLAIM_LOCKED Andrea Arcangeli
2013-06-05 19:23 ` Rik van Riel
2013-06-05 20:37 ` KOSAKI Motohiro
2013-06-05 20:51 ` Christoph Lameter
2013-06-05 21:03 ` KOSAKI Motohiro
2013-06-06 14:15 ` Christoph Lameter
2013-06-06 17:17 ` KOSAKI Motohiro
2013-06-06 18:16 ` Christoph Lameter
2013-06-05 21:33 ` Rafael Aquini
2013-06-06 9:04 ` Mel Gorman
2013-06-06 17:37 ` Rik van Riel
2013-06-14 16:16 ` Rik van Riel
2013-06-17 9:30 ` Mel Gorman
2013-06-17 18:12 ` Rik van Riel
2013-06-26 20:10 ` Andrea Arcangeli
2013-06-05 15:10 ` [PATCH 2/7] mm: compaction: scan all memory with /proc/sys/vm/compact_memory Andrea Arcangeli
2013-06-05 19:34 ` Rik van Riel
2013-06-05 21:39 ` Rafael Aquini
2013-06-06 9:05 ` Mel Gorman
2013-06-05 15:10 ` [PATCH 3/7] mm: compaction: don't depend on kswapd to invoke reset_isolation_suitable Andrea Arcangeli
2013-06-05 19:49 ` Rik van Riel
2013-06-26 20:38 ` Andrea Arcangeli
2013-06-06 9:11 ` Mel Gorman
2013-06-26 20:48 ` Andrea Arcangeli
2013-06-06 12:47 ` Rafael Aquini
2013-06-05 15:10 ` [PATCH 4/7] mm: compaction: reset before initializing the scan cursors Andrea Arcangeli
2013-06-05 20:04 ` Rik van Riel
2013-06-06 9:14 ` Mel Gorman
2013-06-06 12:49 ` Rafael Aquini
2013-06-05 15:10 ` [PATCH 5/7] mm: compaction: increase the high order pages in the watermarks Andrea Arcangeli
2013-06-05 20:18 ` Rik van Riel
2013-06-28 22:14 ` Andrea Arcangeli
2013-06-06 9:19 ` Mel Gorman [this message]
2013-06-05 15:10 ` [PATCH 6/7] mm: compaction: export compact_zone_order() Andrea Arcangeli
2013-06-05 20:24 ` Rik van Riel
2013-06-05 15:10 ` [PATCH 7/7] mm: compaction: add compaction to zone_reclaim_mode Andrea Arcangeli
2013-06-05 22:21 ` Rik van Riel
2013-06-06 10:05 ` Mel Gorman
2013-07-11 16:02 ` Andrea Arcangeli
2013-07-12 12:26 ` Hush Bensen
2013-07-12 16:01 ` Andrea Arcangeli
2013-07-12 23:23 ` Hush Bensen
2013-07-15 9:16 ` Andrea Arcangeli
2013-07-12 23:57 ` Hush Bensen
2013-07-15 9:25 ` Andrea Arcangeli
2013-06-06 8:53 ` [PATCH 0/7] RFC: adding compaction to zone_reclaim_mode > 0 Mel Gorman
2013-06-06 10:09 ` Mel Gorman
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