From: Mel Gorman <mel@csn.ul.ie>
To: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Andrea Arcangeli <aarcange@redhat.com>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
Rik van Riel <riel@redhat.com>,
Johannes Weiner <hannes@cmpxchg.org>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 0/8] Use memory compaction instead of lumpy reclaim during high-order allocations
Date: Thu, 18 Nov 2010 08:44:55 +0000 [thread overview]
Message-ID: <20101118084455.GD8135@csn.ul.ie> (raw)
In-Reply-To: <20101118172627.cf25b83a.kamezawa.hiroyu@jp.fujitsu.com>
On Thu, Nov 18, 2010 at 05:26:27PM +0900, KAMEZAWA Hiroyuki wrote:
> On Thu, 18 Nov 2010 08:12:54 +0000
> Mel Gorman <mel@csn.ul.ie> wrote:
>
> > > > I'm hoping that this series also removes the
> > > > necessity for the "delete lumpy reclaim" patch from the THP tree.
> > >
> > > Now I'm sad. I read all that and was thinking "oh goody, we get to
> > > delete something for once". But no :(
> > >
> > > If you can get this stuff to work nicely, why can't we remove lumpy
> > > reclaim?
> >
> > Ultimately we should be able to. Lumpy reclaim is still there for the
> > !CONFIG_COMPACTION case and to have an option if we find that compaction
> > behaves badly for some reason.
> >
>
> Hmm. CONFIG_COMPACTION depends on CONFIG_MMU. lumpy reclaim will be for NOMMU,
> finally ?
>
Also true. As it is, lumpy reclaim is still there but it's never called
if CONFIG_COMPACTION is set so it's already side-lined.
--
Mel Gorman
Part-time Phd Student Linux Technology Center
University of Limerick IBM Dublin Software Lab
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prev parent reply other threads:[~2010-11-18 8:45 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-17 16:22 [PATCH 0/8] Use memory compaction instead of lumpy reclaim during high-order allocations Mel Gorman
2010-11-17 16:22 ` [PATCH 1/8] mm: compaction: Add trace events for memory compaction activity Mel Gorman
2010-11-17 16:22 ` [PATCH 2/8] mm: vmscan: Convert lumpy_mode into a bitmask Mel Gorman
2010-11-17 16:22 ` [PATCH 3/8] mm: vmscan: Reclaim order-0 and use compaction instead of lumpy reclaim Mel Gorman
2010-11-18 18:09 ` Andrea Arcangeli
2010-11-18 18:30 ` Mel Gorman
2010-11-17 16:22 ` [PATCH 4/8] mm: migration: Allow migration to operate asynchronously and avoid synchronous compaction in the faster path Mel Gorman
2010-11-18 18:21 ` Andrea Arcangeli
2010-11-18 18:34 ` Mel Gorman
2010-11-18 19:00 ` Andrea Arcangeli
2010-11-17 16:22 ` [PATCH 5/8] mm: migration: Cleanup migrate_pages API by matching types for offlining and sync Mel Gorman
2010-11-17 16:22 ` [PATCH 6/8] mm: compaction: Perform a faster scan in try_to_compact_pages() Mel Gorman
2010-11-18 18:34 ` Andrea Arcangeli
2010-11-18 18:50 ` Mel Gorman
2010-11-18 19:08 ` Andrea Arcangeli
2010-11-19 11:16 ` Mel Gorman
2010-11-17 16:22 ` [PATCH 7/8] mm: compaction: Use the LRU to get a hint on where compaction should start Mel Gorman
2010-11-18 9:10 ` KAMEZAWA Hiroyuki
2010-11-18 9:28 ` Mel Gorman
2010-11-18 18:46 ` Andrea Arcangeli
2010-11-19 11:08 ` Mel Gorman
2010-11-17 16:22 ` [PATCH 8/8] mm: vmscan: Rename lumpy_mode to reclaim_mode Mel Gorman
2010-11-17 23:46 ` [PATCH 0/8] Use memory compaction instead of lumpy reclaim during high-order allocations Andrew Morton
2010-11-18 2:03 ` Rik van Riel
2010-11-18 8:12 ` Mel Gorman
2010-11-18 8:26 ` KAMEZAWA Hiroyuki
2010-11-18 8:38 ` Johannes Weiner
2010-11-18 9:20 ` Mel Gorman
2010-11-18 19:49 ` Andrew Morton
2010-11-19 10:48 ` Mel Gorman
2010-11-19 12:43 ` Theodore Tso
2010-11-19 14:05 ` Mel Gorman
2010-11-19 15:45 ` Ted Ts'o
2010-11-18 8:44 ` Mel Gorman [this message]
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