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From: Mel Gorman <mgorman@suse.de>
To: Minchan Kim <minchan@kernel.org>
Cc: Linux-MM <linux-mm@kvack.org>, Rik van Riel <riel@redhat.com>,
	Jim Schutt <jaschut@sandia.gov>,
	LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 3/6] mm: kswapd: Continue reclaiming for reclaim/compaction if the minimum number of pages have not been reclaimed
Date: Wed, 8 Aug 2012 10:58:03 +0100	[thread overview]
Message-ID: <20120808095803.GL29814@suse.de> (raw)
In-Reply-To: <20120808090757.GK29814@suse.de>

On Wed, Aug 08, 2012 at 10:07:57AM +0100, Mel Gorman wrote:
> > <SNIP>
> 
> It was intentional at the time but asking me about it made me reconsider,
> thanks. In too many cases, this is a no-op and any apparent increase of
> kswapd activity is likely a co-incidence. This is untested but is what I
> intended.
> 
> ---8<---
> mm: kswapd: Continue reclaiming for reclaim/compaction if the minimum number of pages have not been reclaimed
> 

And considering this further again, it would partially regress fe2c2a10
and be too aggressive. I'm dropping this patch completely for now and will
revisit it in the future.

Thanks Minchan.

-- 
Mel Gorman
SUSE Labs

WARNING: multiple messages have this Message-ID (diff)
From: Mel Gorman <mgorman@suse.de>
To: Minchan Kim <minchan@kernel.org>
Cc: Linux-MM <linux-mm@kvack.org>, Rik van Riel <riel@redhat.com>,
	Jim Schutt <jaschut@sandia.gov>,
	LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 3/6] mm: kswapd: Continue reclaiming for reclaim/compaction if the minimum number of pages have not been reclaimed
Date: Wed, 8 Aug 2012 10:58:03 +0100	[thread overview]
Message-ID: <20120808095803.GL29814@suse.de> (raw)
In-Reply-To: <20120808090757.GK29814@suse.de>

On Wed, Aug 08, 2012 at 10:07:57AM +0100, Mel Gorman wrote:
> > <SNIP>
> 
> It was intentional at the time but asking me about it made me reconsider,
> thanks. In too many cases, this is a no-op and any apparent increase of
> kswapd activity is likely a co-incidence. This is untested but is what I
> intended.
> 
> ---8<---
> mm: kswapd: Continue reclaiming for reclaim/compaction if the minimum number of pages have not been reclaimed
> 

And considering this further again, it would partially regress fe2c2a10
and be too aggressive. I'm dropping this patch completely for now and will
revisit it in the future.

Thanks Minchan.

-- 
Mel Gorman
SUSE Labs

--
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  reply	other threads:[~2012-08-08  9:58 UTC|newest]

Thread overview: 68+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-08-07 12:31 [RFC PATCH 0/6] Improve hugepage allocation success rates under load Mel Gorman
2012-08-07 12:31 ` Mel Gorman
2012-08-07 12:31 ` [PATCH 1/6] mm: compaction: Update comment in try_to_compact_pages Mel Gorman
2012-08-07 12:31   ` Mel Gorman
2012-08-07 13:19   ` Rik van Riel
2012-08-07 13:19     ` Rik van Riel
2012-08-07 23:25   ` Minchan Kim
2012-08-07 23:25     ` Minchan Kim
2012-08-07 12:31 ` [PATCH 2/6] mm: vmscan: Scale number of pages reclaimed by reclaim/compaction based on failures Mel Gorman
2012-08-07 12:31   ` Mel Gorman
2012-08-07 13:23   ` Rik van Riel
2012-08-07 13:23     ` Rik van Riel
2012-08-08  1:48   ` Minchan Kim
2012-08-08  1:48     ` Minchan Kim
2012-08-08  7:55     ` Mel Gorman
2012-08-08  7:55       ` Mel Gorman
2012-08-08  8:27       ` Minchan Kim
2012-08-08  8:27         ` Minchan Kim
2012-08-08  8:51         ` Mel Gorman
2012-08-08  8:51           ` Mel Gorman
2012-08-08 23:51           ` Minchan Kim
2012-08-08 23:51             ` Minchan Kim
2012-08-09  7:49             ` Mel Gorman
2012-08-09  7:49               ` Mel Gorman
2012-08-09  8:27               ` Minchan Kim
2012-08-09  8:27                 ` Minchan Kim
2012-08-09  9:20                 ` Mel Gorman
2012-08-09  9:20                   ` Mel Gorman
2012-08-09 20:29                   ` Rik van Riel
2012-08-09 20:29                     ` Rik van Riel
2012-08-10  8:14                     ` Mel Gorman
2012-08-10  8:14                       ` Mel Gorman
2012-08-09 23:27                   ` Minchan Kim
2012-08-09 23:27                     ` Minchan Kim
2012-08-10  8:34                     ` Mel Gorman
2012-08-10  8:34                       ` Mel Gorman
2012-08-10  8:48                       ` Minchan Kim
2012-08-10  8:48                         ` Minchan Kim
2012-08-07 12:31 ` [PATCH 3/6] mm: kswapd: Continue reclaiming for reclaim/compaction if the minimum number of pages have not been reclaimed Mel Gorman
2012-08-07 12:31   ` Mel Gorman
2012-08-07 13:26   ` Rik van Riel
2012-08-07 13:26     ` Rik van Riel
2012-08-08  2:07   ` Minchan Kim
2012-08-08  2:07     ` Minchan Kim
2012-08-08  9:07     ` Mel Gorman
2012-08-08  9:07       ` Mel Gorman
2012-08-08  9:58       ` Mel Gorman [this message]
2012-08-08  9:58         ` Mel Gorman
2012-08-07 12:31 ` [PATCH 4/6] mm: compaction: Capture a suitable high-order page immediately when it is made available Mel Gorman
2012-08-07 12:31   ` Mel Gorman
2012-08-07 13:30   ` Rik van Riel
2012-08-07 13:30     ` Rik van Riel
2012-08-07 12:31 ` [PATCH 5/6] mm: have order > 0 compaction start off where it left Mel Gorman
2012-08-07 12:31   ` Mel Gorman
2012-08-07 12:31 ` [PATCH 6/6] mm: have order > 0 compaction start near a pageblock with free pages Mel Gorman
2012-08-07 12:31   ` Mel Gorman
2012-08-07 14:45   ` Rik van Riel
2012-08-07 14:45     ` Rik van Riel
2012-08-07 14:52     ` Mel Gorman
2012-08-07 14:52       ` Mel Gorman
2012-08-07 15:20       ` Jim Schutt
2012-08-07 15:20         ` Jim Schutt
2012-08-07 15:45         ` Mel Gorman
2012-08-07 15:45           ` Mel Gorman
2012-08-08  4:36   ` Minchan Kim
2012-08-08  4:36     ` Minchan Kim
2012-08-08 10:18     ` Mel Gorman
2012-08-08 10:18       ` Mel Gorman

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