From: Hugh Dickins <hughd@google.com>
To: KOSAKI Motohiro <kosaki.motohiro@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Konstantin Khlebnikov <khlebnikov@openvz.org>,
linux-mm@kvack.org
Subject: Re: [PATCH 3/3] mm: take pagevecs off reclaim stack
Date: Thu, 29 Dec 2011 17:55:14 -0800 (PST) [thread overview]
Message-ID: <alpine.LSU.2.00.1112291753350.3614@eggly.anvils> (raw)
In-Reply-To: <4EFD04B2.7050407@gmail.com>
On Thu, 29 Dec 2011, KOSAKI Motohiro wrote:
>
> When lumpy reclaim occur, isolate_lru_pages() gather much pages than
> SWAP_CLUSTER_MAX.
Oh, good point, I hadn't thought of that.
> However, at that time, I think this patch behave
> better than old. If we release and retake zone lock per 14 pages,
> other tasks can easily steal a part of lumpy reclaimed pages. and then
> long latency wrongness will be happen when system is under large page
> memory allocation pressure. That's the reason why I posted very similar patch
> a long time ago.
Aha, and another good point. Thank you.
Hugh
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next prev parent reply other threads:[~2011-12-30 1:55 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-12-29 4:32 [PATCH 0/3] mm: three minor vmscan improvements Hugh Dickins
2011-12-29 4:35 ` [PATCH 1/3] mm: test PageSwapBacked in lumpy reclaim Hugh Dickins
2011-12-29 5:06 ` KOSAKI Motohiro
2012-01-04 1:23 ` Minchan Kim
2012-01-05 6:03 ` KAMEZAWA Hiroyuki
2011-12-29 4:36 ` [PATCH 2/3] mm: cond_resched in scan_mapping_unevictable_pages Hugh Dickins
2011-12-29 5:14 ` KOSAKI Motohiro
2011-12-29 5:48 ` Hugh Dickins
2011-12-29 22:46 ` Hugh Dickins
2011-12-29 4:39 ` [PATCH 3/3] mm: take pagevecs off reclaim stack Hugh Dickins
2011-12-29 5:42 ` KOSAKI Motohiro
2011-12-29 11:18 ` Konstantin Khlebnikov
2011-12-29 22:20 ` Hugh Dickins
2011-12-29 22:55 ` Andrew Morton
2011-12-29 23:27 ` Hugh Dickins
2011-12-30 0:24 ` KOSAKI Motohiro
2011-12-30 1:55 ` Hugh Dickins [this message]
2011-12-30 3:59 ` Andrew Morton
2011-12-30 15:51 ` Mel Gorman
2012-01-01 7:18 ` Hugh Dickins
2012-01-03 23:12 ` Andrew Morton
2012-01-03 23:17 ` KOSAKI Motohiro
2012-01-03 23:29 ` Andrew Morton
2012-01-04 0:03 ` KOSAKI Motohiro
2012-01-04 3:22 ` Hugh Dickins
2012-01-04 20:20 ` Andrew Morton
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