Re: [PATCH 1/6] mm: compaction: Abort compaction loop if lock is contended... | linux-mm

[PATCH 0/6] Reduce compaction scanning and lock contention · Mel Gorman <mgorman@suse.de> · 2012-09-20
[PATCH 1/6] mm: compaction: Abort compaction loop if lock is contended or run too long · Mel Gorman <mgorman@suse.de> · 2012-09-20
Re: [PATCH 1/6] mm: compaction: Abort compaction loop if lock is contended or run too long · Rik van Riel <hidden> · 2012-09-20
[PATCH 6/6] mm: compaction: Restart compaction from near where it left off · Mel Gorman <mgorman@suse.de> · 2012-09-20
Re: [PATCH 6/6] mm: compaction: Restart compaction from near where it left off · Rik van Riel <hidden> · 2012-09-20
[PATCH 5/6] mm: compaction: Cache if a pageblock was scanned and no pages were isolated · Mel Gorman <mgorman@suse.de> · 2012-09-20
Re: [PATCH 5/6] mm: compaction: Cache if a pageblock was scanned and no pages were isolated · Rik van Riel <hidden> · 2012-09-20
[PATCH 4/6] Revert "mm: have order > 0 compaction start off where it left" · Mel Gorman <mgorman@suse.de> · 2012-09-20
Re: [PATCH 4/6] Revert "mm: have order > 0 compaction start off where it left" · Rik van Riel <hidden> · 2012-09-20
[PATCH 3/6] mm: compaction: Acquire the zone->lock as late as possible · Mel Gorman <mgorman@suse.de> · 2012-09-20
Re: [PATCH 3/6] mm: compaction: Acquire the zone->lock as late as possible · Rik van Riel <hidden> · 2012-09-20
[PATCH 2/6] mm: compaction: Acquire the zone->lru_lock as late as possible · Mel Gorman <mgorman@suse.de> · 2012-09-20
Re: [PATCH 2/6] mm: compaction: Acquire the zone->lru_lock as late as possible · Rik van Riel <hidden> · 2012-09-20
Re: [PATCH 0/6] Reduce compaction scanning and lock contention · Richard Davies <hidden> · 2012-09-21
Re: [PATCH 0/6] Reduce compaction scanning and lock contention · Richard Davies <hidden> · 2012-09-21
Re: [PATCH 0/6] Reduce compaction scanning and lock contention · Richard Davies <hidden> · 2012-09-21
Re: [PATCH 0/6] Reduce compaction scanning and lock contention · Mel Gorman <mgorman@suse.de> · 2012-09-21
Re: [PATCH 0/6] Reduce compaction scanning and lock contention · Richard Davies <hidden> · 2012-09-21
Re: [PATCH 0/6] Reduce compaction scanning and lock contention · Mel Gorman <mgorman@suse.de> · 2012-09-21
Re: [PATCH 0/6] Reduce compaction scanning and lock contention · Richard Davies <hidden> · 2012-09-21

Re: [PATCH 1/6] mm: compaction: Abort compaction loop if lock is contended or run too long

From: Rik van Riel <hidden>
Date: 2012-09-20 18:54:15
Also in: kvm, lkml, qemu-devel

On 09/20/2012 10:04 AM, Mel Gorman wrote:

From: Shaohua Li <redacted>

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.

[minchan@kernel.org: Putback pages isolated for migration if aborting]
[akpm@linux-foundation.org: compact_zone_order requires non-NULL arg contended]
Signed-off-by: Andrea Arcangeli <redacted>
Signed-off-by: Shaohua Li <redacted>
Signed-off-by: Mel Gorman <mgorman@suse.de>

Acked-by: Rik van Riel <redacted>

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