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Re: [Qemu-devel] [PATCH 4/9] mm: compaction: Abort compaction loop if lo
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From: |
Minchan Kim |
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Subject: |
Re: [Qemu-devel] [PATCH 4/9] mm: compaction: Abort compaction loop if lock is contended or run too long |
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Date: |
Tue, 25 Sep 2012 16:34:57 +0900 |
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User-agent: |
Mutt/1.5.21 (2010-09-15) |
On Fri, Sep 21, 2012 at 11:46:18AM +0100, Mel Gorman wrote:
> From: Shaohua Li <address@hidden>
>
> Changelog since V2
> o Fix BUG_ON triggered due to pages left on cc.migratepages
> o Make compact_zone_order() require non-NULL arg `contended'
>
> Changelog since V1
> o only abort the compaction if lock is contended or run too long
> o Rearranged the code by Andrea Arcangeli.
>
> isolate_migratepages_range() might isolate no pages if for example when
> zone->lru_lock is contended and running asynchronous compaction. In this
> case, we should abort compaction, otherwise, compact_zone will run a
> useless loop and make zone->lru_lock is even contended.
>
> address@hidden: Putback pages isolated for migration if aborting]
> address@hidden: compact_zone_order requires non-NULL arg contended]
> Signed-off-by: Andrea Arcangeli <address@hidden>
> Signed-off-by: Shaohua Li <address@hidden>
> Signed-off-by: Mel Gorman <address@hidden>
> Acked-by: Rik van Riel <address@hidden>
Acked-by: Minchan Kim <address@hidden>
--
Kind regards,
Minchan Kim
- Re: [Qemu-devel] [PATCH 8/9] mm: compaction: Cache if a pageblock was scanned and no pages were isolated, (continued)
- Re: [Qemu-devel] [PATCH 8/9] mm: compaction: Cache if a pageblock was scanned and no pages were isolated, Mel Gorman, 2012/09/24
- Re: [Qemu-devel] [PATCH 8/9] mm: compaction: Cache if a pageblock was scanned and no pages were isolated, Andrew Morton, 2012/09/24
- Re: [Qemu-devel] [PATCH 8/9] mm: compaction: Cache if a pageblock was scanned and no pages were isolated, Mel Gorman, 2012/09/25
- Re: [Qemu-devel] [PATCH 8/9] mm: compaction: Cache if a pageblock was scanned and no pages were isolated, Andrew Morton, 2012/09/25
- Re: [Qemu-devel] [PATCH 8/9] mm: compaction: Cache if a pageblock was scanned and no pages were isolated, Minchan Kim, 2012/09/25
[Qemu-devel] [PATCH 9/9] mm: compaction: Restart compaction from near where it left off, Mel Gorman, 2012/09/21
[Qemu-devel] [PATCH 4/9] mm: compaction: Abort compaction loop if lock is contended or run too long, Mel Gorman, 2012/09/21
[Qemu-devel] [PATCH 5/9] mm: compaction: Acquire the zone->lru_lock as late as possible, Mel Gorman, 2012/09/21
- Re: [Qemu-devel] [PATCH 5/9] mm: compaction: Acquire the zone->lru_lock as late as possible, Rafael Aquini, 2012/09/21
- Re: [Qemu-devel] [PATCH 5/9] mm: compaction: Acquire the zone->lru_lock as late as possible, Minchan Kim, 2012/09/25
- Re: [Qemu-devel] [PATCH 5/9] mm: compaction: Acquire the zone->lru_lock as late as possible, Mel Gorman, 2012/09/25
- Re: [Qemu-devel] [PATCH 5/9] mm: compaction: Acquire the zone->lru_lock as late as possible, Minchan Kim, 2012/09/25
- Re: [Qemu-devel] [PATCH 5/9] mm: compaction: Acquire the zone->lru_lock as late as possible, Andrew Morton, 2012/09/25
- Re: [Qemu-devel] [PATCH 5/9] mm: compaction: Acquire the zone->lru_lock as late as possible, Minchan Kim, 2012/09/25
- Re: [Qemu-devel] [PATCH 5/9] mm: compaction: Acquire the zone->lru_lock as late as possible, Mel Gorman, 2012/09/26
Re: [Qemu-devel] [PATCH 0/9] Reduce compaction scanning and lock contention, Rik van Riel, 2012/09/21