From: Mel Gorman <mel@csn.ul.ie>
To: Rik van Riel <riel@redhat.com>
Cc: linux-mm@kvack.org, lkml <linux-kernel@vger.kernel.org>,
Andrea Arcangeli <aarcange@redhat.com>,
Johannes Weiner <hannes@cmpxchg.org>,
Andrew Morton <akpm@linux-foundation.org>,
Minchan Kim <minchan.kim@gmail.com>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Subject: Re: [PATCH v3 -mm 3/3] mm: only defer compaction for failed order and higher
Date: Mon, 30 Jan 2012 10:47:18 +0000 [thread overview]
Message-ID: <20120130104718.GC25268@csn.ul.ie> (raw)
In-Reply-To: <20120126150102.30b75cfe@cuia.bos.redhat.com>
On Thu, Jan 26, 2012 at 03:01:02PM -0500, Rik van Riel wrote:
> Currently a failed order-9 (transparent hugepage) compaction can
> lead to memory compaction being temporarily disabled for a memory
> zone. Even if we only need compaction for an order 2 allocation,
> eg. for jumbo frames networking.
>
> The fix is relatively straightforward: keep track of the highest
> order at which compaction is succeeding, and only defer compaction
> for orders at which compaction is failing.
>
> Signed-off-by: Rik van Riel <riel@redhat.com>
Acked-by: Mel Gorman <mel@csn.ul.ie>
--
Mel Gorman
SUSE Labs
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WARNING: multiple messages have this Message-ID (diff)
From: Mel Gorman <mel@csn.ul.ie>
To: Rik van Riel <riel@redhat.com>
Cc: linux-mm@kvack.org, lkml <linux-kernel@vger.kernel.org>,
Andrea Arcangeli <aarcange@redhat.com>,
Johannes Weiner <hannes@cmpxchg.org>,
Andrew Morton <akpm@linux-foundation.org>,
Minchan Kim <minchan.kim@gmail.com>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Subject: Re: [PATCH v3 -mm 3/3] mm: only defer compaction for failed order and higher
Date: Mon, 30 Jan 2012 10:47:18 +0000 [thread overview]
Message-ID: <20120130104718.GC25268@csn.ul.ie> (raw)
In-Reply-To: <20120126150102.30b75cfe@cuia.bos.redhat.com>
On Thu, Jan 26, 2012 at 03:01:02PM -0500, Rik van Riel wrote:
> Currently a failed order-9 (transparent hugepage) compaction can
> lead to memory compaction being temporarily disabled for a memory
> zone. Even if we only need compaction for an order 2 allocation,
> eg. for jumbo frames networking.
>
> The fix is relatively straightforward: keep track of the highest
> order at which compaction is succeeding, and only defer compaction
> for orders at which compaction is failing.
>
> Signed-off-by: Rik van Riel <riel@redhat.com>
Acked-by: Mel Gorman <mel@csn.ul.ie>
--
Mel Gorman
SUSE Labs
next prev parent reply other threads:[~2012-01-30 10:47 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-01-26 19:54 [PATCH v3 -mm 0/3] kswapd vs compaction improvements Rik van Riel
2012-01-26 19:54 ` Rik van Riel
2012-01-26 19:59 ` [PATCH v3 -mm 1/3] mm: reclaim at order 0 when compaction is enabled Rik van Riel
2012-01-26 19:59 ` Rik van Riel
2012-01-27 9:13 ` Hillf Danton
2012-01-27 9:13 ` Hillf Danton
2012-01-27 16:35 ` Rik van Riel
2012-01-27 16:35 ` Rik van Riel
2012-01-30 10:26 ` Mel Gorman
2012-01-30 10:26 ` Mel Gorman
2012-01-27 23:31 ` Andrew Morton
2012-01-27 23:31 ` Andrew Morton
2012-01-29 13:25 ` Hillf Danton
2012-01-29 13:25 ` Hillf Danton
2012-01-30 10:36 ` Mel Gorman
2012-01-30 10:36 ` Mel Gorman
2012-01-26 19:59 ` [PATCH v3 -mm 2/3] mm: kswapd carefully call compaction Rik van Riel
2012-01-26 19:59 ` Rik van Riel
2012-01-27 23:36 ` Andrew Morton
2012-01-27 23:36 ` Andrew Morton
2012-01-26 20:01 ` [PATCH v3 -mm 3/3] mm: only defer compaction for failed order and higher Rik van Riel
2012-01-26 20:01 ` Rik van Riel
2012-01-30 10:47 ` Mel Gorman [this message]
2012-01-30 10:47 ` Mel Gorman
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