Re: [PATCH 7/9] Revert "mm: have order > 0 compaction start off where it left"

[PATCH 0/9] Reduce compaction scanning and lock contention · Mel Gorman <mgorman@suse.de> · 2012-09-21
[PATCH 1/9] Revert "mm: compaction: check lock contention first before taking lock" · Mel Gorman <mgorman@suse.de> · 2012-09-21
Re: [PATCH 1/9] Revert "mm: compaction: check lock contention first before taking lock" · Rafael Aquini <hidden> · 2012-09-21
[PATCH 3/9] Revert "mm: compaction: abort compaction loop if lock is contended or run too long" · Mel Gorman <mgorman@suse.de> · 2012-09-21
Re: [PATCH 3/9] Revert "mm: compaction: abort compaction loop if lock is contended or run too long" · Rafael Aquini <hidden> · 2012-09-21
[PATCH 5/9] mm: compaction: Acquire the zone->lru_lock as late as possible · Mel Gorman <mgorman@suse.de> · 2012-09-21
Re: [PATCH 5/9] mm: compaction: Acquire the zone->lru_lock as late as possible · Rafael Aquini <hidden> · 2012-09-21
Re: [PATCH 5/9] mm: compaction: Acquire the zone->lru_lock as late as possible · Minchan Kim <minchan@kernel.org> · 2012-09-25
Re: [PATCH 5/9] mm: compaction: Acquire the zone->lru_lock as late as possible · Mel Gorman <mgorman@suse.de> · 2012-09-25
Re: [PATCH 5/9] mm: compaction: Acquire the zone->lru_lock as late as possible · Minchan Kim <minchan@kernel.org> · 2012-09-25
Re: [PATCH 5/9] mm: compaction: Acquire the zone->lru_lock as late as possible · Andrew Morton <akpm@linux-foundation.org> · 2012-09-25
Re: [PATCH 5/9] mm: compaction: Acquire the zone->lru_lock as late as possible · Minchan Kim <minchan@kernel.org> · 2012-09-26
Re: [PATCH 5/9] mm: compaction: Acquire the zone->lru_lock as late as possible · Mel Gorman <mgorman@suse.de> · 2012-09-26
[PATCH 4/9] mm: compaction: Abort compaction loop if lock is contended or run too long · Mel Gorman <mgorman@suse.de> · 2012-09-21
Re: [PATCH 4/9] mm: compaction: Abort compaction loop if lock is contended or run too long · Rafael Aquini <hidden> · 2012-09-21
Re: [PATCH 4/9] mm: compaction: Abort compaction loop if lock is contended or run too long · Andrew Morton <akpm@linux-foundation.org> · 2012-09-21
Re: [PATCH 4/9] mm: compaction: Abort compaction loop if lock is contended or run too long · Minchan Kim <minchan@kernel.org> · 2012-09-25
[PATCH 7/9] Revert "mm: have order > 0 compaction start off where it left" · Mel Gorman <mgorman@suse.de> · 2012-09-21
Re: [PATCH 7/9] Revert "mm: have order > 0 compaction start off where it left" · Rafael Aquini <hidden> · 2012-09-21
Re: [PATCH 7/9] Revert "mm: have order > 0 compaction start off where it left" · Minchan Kim <minchan@kernel.org> · 2012-09-25
[PATCH 6/9] mm: compaction: Acquire the zone->lock as late as possible · Mel Gorman <mgorman@suse.de> · 2012-09-21
Re: [PATCH 6/9] mm: compaction: Acquire the zone->lock as late as possible · Rafael Aquini <hidden> · 2012-09-21
Re: [PATCH 6/9] mm: compaction: Acquire the zone->lock as late as possible · Andrew Morton <akpm@linux-foundation.org> · 2012-09-21
Re: [PATCH 6/9] mm: compaction: Acquire the zone->lock as late as possible · Mel Gorman <mgorman@suse.de> · 2012-09-24
Re: [PATCH 6/9] mm: compaction: Acquire the zone->lock as late as possible · Minchan Kim <minchan@kernel.org> · 2012-09-25
Re: [PATCH 6/9] mm: compaction: Acquire the zone->lock as late as possible · Minchan Kim <minchan@kernel.org> · 2012-09-25
[PATCH 9/9] mm: compaction: Restart compaction from near where it left off · Mel Gorman <mgorman@suse.de> · 2012-09-21
Re: [PATCH 9/9] mm: compaction: Restart compaction from near where it left off · Rafael Aquini <hidden> · 2012-09-21
[PATCH 8/9] mm: compaction: Cache if a pageblock was scanned and no pages were isolated · Mel Gorman <mgorman@suse.de> · 2012-09-21
Re: [PATCH 8/9] mm: compaction: Cache if a pageblock was scanned and no pages were isolated · Rafael Aquini <hidden> · 2012-09-21
Re: [PATCH 8/9] mm: compaction: Cache if a pageblock was scanned and no pages were isolated · Andrew Morton <akpm@linux-foundation.org> · 2012-09-21
Re: [PATCH 8/9] mm: compaction: Cache if a pageblock was scanned and no pages were isolated · Mel Gorman <mgorman@suse.de> · 2012-09-24
Re: [PATCH 8/9] mm: compaction: Cache if a pageblock was scanned and no pages were isolated · Andrew Morton <akpm@linux-foundation.org> · 2012-09-24
Re: [PATCH 8/9] mm: compaction: Cache if a pageblock was scanned and no pages were isolated · Mel Gorman <mgorman@suse.de> · 2012-09-25
Re: [PATCH 8/9] mm: compaction: Cache if a pageblock was scanned and no pages were isolated · Andrew Morton <akpm@linux-foundation.org> · 2012-09-25
[PATCH] mm: compaction: cache if a pageblock was scanned and no pages were isolated -fix2 · Mel Gorman <mgorman@suse.de> · 2012-09-27
Re: [PATCH 8/9] mm: compaction: Cache if a pageblock was scanned and no pages were isolated · Mel Gorman <mgorman@suse.de> · 2012-09-27
Re: [PATCH 8/9] mm: compaction: Cache if a pageblock was scanned and no pages were isolated · Minchan Kim <minchan@kernel.org> · 2012-09-26
Re: [PATCH 8/9] mm: compaction: Cache if a pageblock was scanned and no pages were isolated · Mel Gorman <mgorman@suse.de> · 2012-09-27
[PATCH 2/9] Revert "mm-compaction-abort-compaction-loop-if-lock-is-contended-or-run-too-long-fix" · Mel Gorman <mgorman@suse.de> · 2012-09-21
Re: [PATCH 2/9] Revert "mm-compaction-abort-compaction-loop-if-lock-is-contended-or-run-too-long-fix" · Rafael Aquini <hidden> · 2012-09-21
Re: [PATCH 0/9] Reduce compaction scanning and lock contention · Rik van Riel <hidden> · 2012-09-21

From: Minchan Kim <minchan@kernel.org>
Date: 2012-09-25 07:34:45
Also in: kvm, lkml, qemu-devel

On Fri, Sep 21, 2012 at 11:46:21AM +0100, Mel Gorman wrote:

This reverts commit 7db8889a (mm: have order > 0 compaction start off
where it left) and commit de74f1cc (mm: have order > 0 compaction start
near a pageblock with free pages). These patches were a good idea and
tests confirmed that they massively reduced the amount of scanning but
the implementation is complex and tricky to understand. A later patch
will cache what pageblocks should be skipped and reimplements the
concept of compact_cached_free_pfn on top for both migration and
free scanners.

Signed-off-by: Mel Gorman <mgorman@suse.de>
Acked-by: Rik van Riel <redacted>

Acked-by: Minchan Kim <minchan@kernel.org>

-- 
Kind regards,
Minchan Kim

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