From: Andrew Morton <akpm@linux-foundation.org>
To: Mel Gorman <mel@csn.ul.ie>
Cc: Johannes Weiner <hannes@cmpxchg.org>,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
Andrea Arcangeli <aarcange@redhat.com>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
Rik van Riel <riel@redhat.com>,
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 11:49:28 -0800 [thread overview]
Message-ID: <20101118114928.ecb2d6b0.akpm@linux-foundation.org> (raw)
In-Reply-To: <20101118092044.GE8135@csn.ul.ie>
On Thu, 18 Nov 2010 09:20:44 +0000
Mel Gorman <mel@csn.ul.ie> wrote:
> > It's because migration depends on MMU. But we should be able to make
> > a NOMMU version of migration that just does page cache, which is all
> > that is reclaimable on NOMMU anyway.
> >
>
> Conceivably, but I see little problem leaving them with lumpy reclaim.
I see a really big problem: we'll need to maintain lumpy reclaim for
ever!
We keep on piling in more and more stuff, we're getting less sure that
the old stuff is still effective. It's becoming more and more
important to move some of our attention over to simplification, and
to rejustification of earlier decisions.
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next prev parent reply other threads:[~2010-11-18 19:50 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-17 16:22 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 [this message]
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
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