From: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
To: Andrea Arcangeli <aarcange@redhat.com>
Cc: kosaki.motohiro@jp.fujitsu.com, Mel Gorman <mel@csn.ul.ie>,
LKML <linux-kernel@vger.kernel.org>,
linux-mm <linux-mm@kvack.org>,
Andrew Morton <akpm@linux-foundation.org>,
Johannes Weiner <hannes@cmpxchg.org>,
Wu Fengguang <fengguang.wu@intel.com>,
Minchan Kim <minchan.kim@gmail.com>,
Rik van Riel <riel@redhat.com>
Subject: Re: [PATCH 4/7] vmscan: narrowing synchrounous lumply reclaim condition
Date: Thu, 28 Oct 2010 17:00:57 +0900 (JST) [thread overview]
Message-ID: <20101028162522.B0B5.A69D9226@jp.fujitsu.com> (raw)
In-Reply-To: <20101027180333.GE29304@random.random>
Hi
> My tree uses compaction in a fine way inside kswapd too and tons of
> systems are running without lumpy and floods of order 9 allocations
> with only compaction (in direct reclaim and kswapd) without the
> slighest problem. Furthermore I extended compaction for all
> allocations not just that PAGE_ALLOC_COSTLY_ORDER (maybe I already
> removed all PAGE_ALLOC_COSTLY_ORDER checks?). There's no good reason
> not to use compaction for every allocation including 1,2,3, and things
> works fine this way.
Interesting. I parsed this you have compaction improvement. If so,
can you please post them? Generically, 1) improve the feature 2) remove
unused one is safety order. In the other hand, reverse order seems to has
regression risk.
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next prev parent reply other threads:[~2010-10-28 8:01 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-08-05 6:11 [RFC][PATCH 0/7] low latency synchrounous lumpy reclaim KOSAKI Motohiro
2010-08-05 6:12 ` [PATCH 1/7] vmscan: raise the bar to PAGEOUT_IO_SYNC stalls KOSAKI Motohiro
2010-08-05 15:02 ` Mel Gorman
2010-08-08 6:42 ` KOSAKI Motohiro
2010-08-05 15:19 ` Rik van Riel
2010-08-05 6:13 ` [PATCH 2/7] vmscan: synchronous lumpy reclaim don't call congestion_wait() KOSAKI Motohiro
2010-08-05 13:55 ` Minchan Kim
2010-08-05 15:05 ` Rik van Riel
2010-08-05 15:06 ` Mel Gorman
2010-08-05 6:13 ` [PATCH 3/7] vmscan: synchrounous lumpy reclaim use lock_page() instead trylock_page() KOSAKI Motohiro
2010-08-05 14:17 ` Minchan Kim
2010-08-06 0:52 ` Minchan Kim
2010-08-05 15:12 ` Mel Gorman
2010-08-05 15:26 ` Rik van Riel
2010-08-05 6:14 ` [PATCH 4/7] vmscan: narrowing synchrounous lumply reclaim condition KOSAKI Motohiro
2010-08-05 14:59 ` Minchan Kim
2010-10-27 16:41 ` Andrea Arcangeli
2010-10-27 17:16 ` Mel Gorman
2010-10-27 18:03 ` Andrea Arcangeli
2010-10-28 8:00 ` KOSAKI Motohiro [this message]
2010-10-28 15:12 ` Andrea Arcangeli
2010-10-29 2:23 ` KOSAKI Motohiro
2010-10-28 10:20 ` Mel Gorman
2010-11-02 2:04 ` Wu Fengguang
2010-10-28 2:31 ` Ed Tomlinson
2010-10-28 15:22 ` Andrea Arcangeli
2010-08-05 6:14 ` [PATCH 5/7] vmscan: kill dead code in shrink_inactive_list() KOSAKI Motohiro
2010-08-05 15:08 ` Minchan Kim
2010-08-05 15:14 ` Mel Gorman
2010-08-05 6:15 ` [PATCH 6/7] vmscan: remove PF_SWAPWRITE from __zone_reclaim() KOSAKI Motohiro
2010-08-05 6:16 ` [PATCH 7/7] vmscan: isolated_lru_pages() stop neighbor search if neighbor can't be isolated KOSAKI Motohiro
2010-08-05 15:25 ` Mel Gorman
2010-08-05 15:40 ` Minchan Kim
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