From: Minchan Kim <minchan.kim@gmail.com>
To: Andrea Arcangeli <aarcange@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Mel Gorman <mel@csn.ul.ie>, Johannes Weiner <jweiner@redhat.com>,
linux-mm@kvack.org
Subject: Re: [PATCH] remove compaction from kswapd
Date: Wed, 2 Mar 2011 07:33:13 +0900 [thread overview]
Message-ID: <AANLkTingkWo6dx=0sGdmz9qNp+_TrQnKXnmASwD8LhV4@mail.gmail.com> (raw)
In-Reply-To: <20110228222138.GP22700@random.random>
On Tue, Mar 1, 2011 at 7:21 AM, Andrea Arcangeli <aarcange@redhat.com> wrote:
> This is important to apply in 2.6.38. The imporoved
> compaction-in-kswapd logic worked much better then the upstream one,
> but performance was still a little better with no compaction in
> kswapd. This is also somewhat saver as it removes a feature (that is
> hurting performance a bit) instead of improving it. We used a network
> benchmark. This is also confirmed by Arthur on lkml using a different
> multimedia workload and checking kswapd CPU utilization.
Could you provide the result of benchmark and input from others in description?
Sorry for bothering you but I think you get the data.
It helps someone in future very much to know why we determined to
remove the feature at that time and they should do what kinds of
experiment to prove it has a benefit to add compaction in kswapd
again.
--
Kind regards,
Minchan Kim
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next prev parent reply other threads:[~2011-03-01 22:33 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-02-28 22:21 [PATCH] remove compaction from kswapd Andrea Arcangeli
2011-03-01 22:33 ` Minchan Kim [this message]
2011-03-01 22:39 ` Andrea Arcangeli
2011-03-01 23:10 ` Minchan Kim
2011-03-02 0:41 ` Andrew Morton
2011-03-02 4:38 ` Andrea Arcangeli
2011-03-02 4:39 ` Andrea Arcangeli
2011-03-02 4:53 ` Andrew Morton
2011-03-02 5:52 ` Andrea Arcangeli
2011-03-02 5:57 ` Andrew Morton
2011-03-02 17:21 ` Andrea Arcangeli
2011-03-02 14:25 ` Mel Gorman
2011-03-09 22:17 ` Andrew Morton
2011-03-09 23:50 ` Andrea Arcangeli
2011-03-10 10:11 ` Mel Gorman
2011-03-09 17:00 ` Andrea Arcangeli
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