From: Rik van Riel <riel@redhat.com>
To: Minchan Kim <minchan.kim@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
linux-mm <linux-mm@kvack.org>,
LKML <linux-kernel@vger.kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
Johannes Weiner <hannes@cmpxchg.org>,
Nick Piggin <npiggin@kernel.dk>
Subject: Re: [RFC 1/2] deactive invalidated pages
Date: Sun, 21 Nov 2010 20:17:29 -0500 [thread overview]
Message-ID: <4CE9C4A9.3040406@redhat.com> (raw)
In-Reply-To: <bdd6628e81c06f6871983c971d91160fca3f8b5e.1290349672.git.minchan.kim@gmail.com>
On 11/21/2010 09:30 AM, Minchan Kim wrote:
> Recently, there are reported problem about thrashing.
> (http://marc.info/?l=rsync&m=128885034930933&w=2)
> It happens by backup workloads(ex, nightly rsync).
> That's because the workload makes just use-once pages
> and touches pages twice. It promotes the page into
> active list so that it results in working set page eviction.
>
> Some app developer want to support POSIX_FADV_NOREUSE.
> But other OSes don't support it, either.
> (http://marc.info/?l=linux-mm&m=128928979512086&w=2)
>
> By Other approach, app developer uses POSIX_FADV_DONTNEED.
> But it has a problem. If kernel meets page is writing
> during invalidate_mapping_pages, it can't work.
> It is very hard for application programmer to use it.
> Because they always have to sync data before calling
> fadivse(..POSIX_FADV_DONTNEED) to make sure the pages could
> be discardable. At last, they can't use deferred write of kernel
> so that they could see performance loss.
> (http://insights.oetiker.ch/linux/fadvise.html)
This looks promising...
Acked-by: Rik van Riel <riel@redhat.com>
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next prev parent reply other threads:[~2010-11-22 1:17 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-21 14:30 [RFC 1/2] deactive invalidated pages Minchan Kim
2010-11-21 14:30 ` [RFC 2/2] Prevent promotion of page in madvise_dontneed Minchan Kim
2010-11-21 14:38 ` Minchan Kim
2010-11-21 16:34 ` Ben Gamari
2010-11-22 0:31 ` Minchan Kim
2010-11-22 22:21 ` Andrew Morton
2010-11-23 4:57 ` Minchan Kim
2010-11-23 9:50 ` Mel Gorman
2010-11-23 23:49 ` Minchan Kim
2010-11-21 15:21 ` [RFC 1/2] deactive invalidated pages Ben Gamari
2010-11-23 7:16 ` KOSAKI Motohiro
2010-11-23 13:48 ` Ben Gamari
2010-11-23 23:48 ` Minchan Kim
2010-11-23 14:49 ` [RFC PATCH] fadvise support in rsync Ben Gamari
2010-11-23 15:35 ` Pádraig Brady
2010-11-24 0:17 ` KOSAKI Motohiro
2010-11-23 14:49 ` [PATCH 1/3] Add fadvise interface wrapper Ben Gamari
2010-11-23 14:49 ` [PATCH 2/3] Inform kernel of FADV_DONTNEED hint in sender Ben Gamari
2010-11-23 14:49 ` [PATCH 3/3] Inform kernel of FADV_DONTNEED hint in receiver Ben Gamari
2010-11-22 1:17 ` Rik van Riel [this message]
2010-11-22 22:14 ` [RFC 1/2] deactive invalidated pages Andrew Morton
2010-11-23 4:52 ` Minchan Kim
2010-11-23 5:01 ` Andrew Morton
2010-11-23 5:23 ` Minchan Kim
2010-11-23 5:22 ` Andrew Morton
2010-11-23 5:45 ` Minchan Kim
2010-11-23 5:48 ` Andrew Morton
2010-11-23 6:05 ` Minchan Kim
2010-11-23 7:15 ` Andrew Morton
2010-11-23 7:44 ` Minchan Kim
2010-11-23 7:53 ` Andrew Morton
2010-11-23 8:02 ` Minchan Kim
2010-11-23 9:43 ` Mel Gorman
2010-11-23 23:32 ` Minchan Kim
2010-11-23 9:38 ` Mel Gorman
2010-11-23 14:55 ` Ben Gamari
2010-11-23 14:58 ` Mel Gorman
2010-11-23 20:35 ` Andrew Morton
2010-11-23 22:10 ` Mel Gorman
2010-11-23 23:45 ` Minchan Kim
2010-11-24 18:01 ` Mel Gorman
2010-11-23 7:16 ` KOSAKI Motohiro
2010-11-23 7:40 ` Minchan Kim
2010-11-23 7:42 ` Andrew Morton
2010-11-23 8:01 ` KOSAKI Motohiro
2010-11-23 8:44 ` Minchan Kim
2010-11-23 9:02 ` KOSAKI Motohiro
2010-11-23 9:05 ` Minchan Kim
2010-11-23 9:07 ` Minchan Kim
2010-11-23 14:57 ` Ben Gamari
2010-11-24 0:13 ` KOSAKI Motohiro
2010-11-23 9:28 ` Mel Gorman
2010-11-23 23:24 ` Minchan Kim
2010-11-24 10:02 ` Mel Gorman
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