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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>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
	KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
	Mel Gorman <mgorman@suse.de>,
	Andrea Arcangeli <aarcange@redhat.com>,
	Johannes Weiner <hannes@cmpxchg.org>
Subject: Re: [PATCH v2 04/10] Add additional isolation mode
Date: Wed, 01 Jun 2011 11:55:51 -0400	[thread overview]
Message-ID: <4DE66107.10908@redhat.com> (raw)
In-Reply-To: <5b0f0be7ee441ea27ffcad81d2637ac09407acf3.1306689214.git.minchan.kim@gmail.com>

On 05/29/2011 02:13 PM, Minchan Kim wrote:
> There are some places to isolate lru page and I believe
> users of isolate_lru_page will be growing.
> The purpose of them is each different so part of isolated pages
> should put back to LRU, again.
>
> The problem is when we put back the page into LRU,
> we lose LRU ordering and the page is inserted at head of LRU list.
> It makes unnecessary LRU churning so that vm can evict working set pages
> rather than idle pages.
>
> This patch adds new modes when we isolate page in LRU so we don't isolate pages
> if we can't handle it. It could reduce LRU churning.
>
> This patch doesn't change old behavior. It's just used by next patches.
>
> Cc: KOSAKI Motohiro<kosaki.motohiro@jp.fujitsu.com>
> Cc: Mel Gorman<mgorman@suse.de>
> Cc: Rik van Riel<riel@redhat.com>
> Cc: Andrea Arcangeli<aarcange@redhat.com>
> Cc: Johannes Weiner<hannes@cmpxchg.org>
> Cc: KAMEZAWA Hiroyuki<kamezawa.hiroyu@jp.fujitsu.com>
> Signed-off-by: Minchan Kim<minchan.kim@gmail.com>

Acked-by: Rik van Riel <riel@redhat.com>

WARNING: multiple messages have this Message-ID (diff)
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>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
	KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
	Mel Gorman <mgorman@suse.de>,
	Andrea Arcangeli <aarcange@redhat.com>,
	Johannes Weiner <hannes@cmpxchg.org>
Subject: Re: [PATCH v2 04/10] Add additional isolation mode
Date: Wed, 01 Jun 2011 11:55:51 -0400	[thread overview]
Message-ID: <4DE66107.10908@redhat.com> (raw)
In-Reply-To: <5b0f0be7ee441ea27ffcad81d2637ac09407acf3.1306689214.git.minchan.kim@gmail.com>

On 05/29/2011 02:13 PM, Minchan Kim wrote:
> There are some places to isolate lru page and I believe
> users of isolate_lru_page will be growing.
> The purpose of them is each different so part of isolated pages
> should put back to LRU, again.
>
> The problem is when we put back the page into LRU,
> we lose LRU ordering and the page is inserted at head of LRU list.
> It makes unnecessary LRU churning so that vm can evict working set pages
> rather than idle pages.
>
> This patch adds new modes when we isolate page in LRU so we don't isolate pages
> if we can't handle it. It could reduce LRU churning.
>
> This patch doesn't change old behavior. It's just used by next patches.
>
> Cc: KOSAKI Motohiro<kosaki.motohiro@jp.fujitsu.com>
> Cc: Mel Gorman<mgorman@suse.de>
> Cc: Rik van Riel<riel@redhat.com>
> Cc: Andrea Arcangeli<aarcange@redhat.com>
> Cc: Johannes Weiner<hannes@cmpxchg.org>
> Cc: KAMEZAWA Hiroyuki<kamezawa.hiroyu@jp.fujitsu.com>
> Signed-off-by: Minchan Kim<minchan.kim@gmail.com>

Acked-by: Rik van Riel <riel@redhat.com>

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  parent reply	other threads:[~2011-06-01 15:56 UTC|newest]

Thread overview: 50+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-05-29 18:13 [PATCH v2 00/10] Prevent LRU churning Minchan Kim
2011-05-29 18:13 ` Minchan Kim
2011-05-29 18:13 ` [PATCH v2 01/10] Make clear description of isolate/putback functions Minchan Kim
2011-05-29 18:13   ` Minchan Kim
2011-05-31 20:48   ` Rik van Riel
2011-05-31 20:48     ` Rik van Riel
2011-05-29 18:13 ` [PATCH v2 02/10] compaction: trivial clean up acct_isolated Minchan Kim
2011-05-29 18:13   ` Minchan Kim
2011-05-31 12:11   ` Johannes Weiner
2011-05-31 12:11     ` Johannes Weiner
2011-06-01 15:31   ` Rik van Riel
2011-06-01 15:31     ` Rik van Riel
2011-05-29 18:13 ` [PATCH v2 03/10] Change isolate mode from int type to enum type Minchan Kim
2011-05-29 18:13   ` Minchan Kim
2011-05-31 13:36   ` Johannes Weiner
2011-05-31 13:36     ` Johannes Weiner
2011-05-31 13:44     ` Minchan Kim
2011-05-31 13:44       ` Minchan Kim
2011-05-29 18:13 ` [PATCH v2 04/10] Add additional isolation mode Minchan Kim
2011-05-29 18:13   ` Minchan Kim
2011-05-31 13:39   ` Johannes Weiner
2011-05-31 13:39     ` Johannes Weiner
2011-06-01 15:55   ` Rik van Riel [this message]
2011-06-01 15:55     ` Rik van Riel
2011-05-29 18:13 ` [PATCH v2 05/10] compaction: make isolate_lru_page with filter aware Minchan Kim
2011-05-29 18:13   ` Minchan Kim
2011-06-01 16:03   ` Rik van Riel
2011-06-01 16:03     ` Rik van Riel
2011-05-29 18:13 ` [PATCH v2 06/10] vmscan: " Minchan Kim
2011-05-29 18:13   ` Minchan Kim
2011-05-31 13:46   ` Johannes Weiner
2011-05-31 13:46     ` Johannes Weiner
2011-05-31 13:51     ` Minchan Kim
2011-05-31 13:51       ` Minchan Kim
2011-05-29 18:13 ` [PATCH v2 07/10] In order putback lru core Minchan Kim
2011-05-29 18:13   ` Minchan Kim
2011-06-01 21:08   ` Rik van Riel
2011-06-01 21:08     ` Rik van Riel
2011-05-29 18:13 ` [PATCH v2 08/10] migration: make in-order-putback aware Minchan Kim
2011-05-29 18:13   ` Minchan Kim
2011-05-29 18:13 ` [PATCH v2 09/10] compaction: make compaction use in-order putback Minchan Kim
2011-05-29 18:13   ` Minchan Kim
2011-05-29 18:13 ` [PATCH v2 10/10] add tracepoints Minchan Kim
2011-05-29 18:13   ` Minchan Kim
2011-05-29 18:37 ` [PATCH v2 00/10] Prevent LRU churning Minchan Kim
2011-05-29 18:37   ` Minchan Kim
2011-05-30  1:47 ` KOSAKI Motohiro
2011-05-30  1:47   ` KOSAKI Motohiro
2011-05-30  7:25   ` Minchan Kim
2011-05-30  7:25     ` Minchan Kim

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