From: Andrea Arcangeli <aarcange@redhat.com>
To: Mel Gorman <mel@csn.ul.ie>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Arthur Marsh <arthur.marsh@internode.on.net>,
Clemens Ladisch <cladisch@googlemail.com>,
Linux-MM <linux-mm@kvack.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 0/2] Reduce the amount of time compaction disables IRQs for V2
Date: Fri, 25 Feb 2011 21:07:23 +0100 [thread overview]
Message-ID: <20110225200722.GU23252@random.random> (raw)
In-Reply-To: <1298664299-10270-1-git-send-email-mel@csn.ul.ie>
On Fri, Feb 25, 2011 at 08:04:57PM +0000, Mel Gorman wrote:
> Changelog since V1
> o Fix initialisation of isolated (Andrea)
>
> The following two patches are aimed at reducing the amount of time IRQs are
> disabled. It was reported by some ALSA people that transparent hugepages was
> causing slowdowns on MIDI playback but I strongly suspect that compaction
> running for smaller orders was also a factor. The theory was that IRQs
> were being disabled for too long and sure enough, compaction was found to
> be disabling IRQs for a long time. The patches reduce the length of time
> IRQs are disabled when scanning for free pages and for pages to migrate.
>
> It's late in the cycle but the IRQs disabled times are sufficiently bad
> that it would be desirable to have these merged for 2.6.38 if possible.
>
> mm/compaction.c | 35 ++++++++++++++++++++++++++++++-----
> 1 files changed, 30 insertions(+), 5 deletions(-)
both patches:
Acked-by: Andrea Arcangeli <aarcange@redhat.com>
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prev parent reply other threads:[~2011-02-25 20:07 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-02-25 20:04 [PATCH 0/2] Reduce the amount of time compaction disables IRQs for V2 Mel Gorman
2011-02-25 20:04 ` [PATCH 1/2] mm: compaction: Minimise the time IRQs are disabled while isolating free pages Mel Gorman
2011-02-25 22:34 ` Johannes Weiner
2011-02-28 1:55 ` KAMEZAWA Hiroyuki
2011-02-28 22:08 ` Minchan Kim
2011-02-25 20:04 ` [PATCH 2/2] mm: compaction: Minimise the time IRQs are disabled while isolating pages for migration Mel Gorman
2011-02-25 22:32 ` Johannes Weiner
2011-02-26 0:16 ` Andrea Arcangeli
2011-02-28 2:17 ` KAMEZAWA Hiroyuki
2011-02-28 5:48 ` Andrea Arcangeli
2011-02-28 5:54 ` KAMEZAWA Hiroyuki
2011-02-28 9:28 ` Mel Gorman
2011-02-28 9:42 ` KAMEZAWA Hiroyuki
2011-02-28 10:18 ` Mel Gorman
2011-02-28 23:42 ` KAMEZAWA Hiroyuki
2011-03-01 4:11 ` Minchan Kim
2011-03-01 4:49 ` KAMEZAWA Hiroyuki
2011-02-28 23:01 ` Minchan Kim
2011-02-28 23:07 ` Andrea Arcangeli
2011-02-28 23:25 ` Minchan Kim
2011-03-01 22:15 ` Andrew Morton
2011-02-25 20:07 ` Andrea Arcangeli [this message]
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