diff options
| author | Mel Gorman <mgorman@suse.de> | 2012-10-09 01:32:40 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-10-09 09:22:50 +0200 |
| commit | 753341a4b85ff337487b9959c71c529f522004f4 (patch) | |
| tree | 6a705fd73dd599e7eeb58cb06e84c86c07c03a64 /mm/internal.h | |
| parent | mm: compaction: acquire the zone->lock as late as possible (diff) | |
| download | linux-753341a4b85ff337487b9959c71c529f522004f4.tar.xz linux-753341a4b85ff337487b9959c71c529f522004f4.zip | |
revert "mm: have order > 0 compaction start off where it left"
This reverts commit 7db8889ab05b ("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 <riel@redhat.com>
Cc: Richard Davies <richard@arachsys.com>
Cc: Shaohua Li <shli@kernel.org>
Cc: Avi Kivity <avi@redhat.com>
Acked-by: Rafael Aquini <aquini@redhat.com>
Acked-by: Minchan Kim <minchan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/internal.h')
| -rw-r--r-- | mm/internal.h | 6 |
1 files changed, 0 insertions, 6 deletions
diff --git a/mm/internal.h b/mm/internal.h index 97664be2ca37..6f6bb9ab9386 100644 --- a/mm/internal.h +++ b/mm/internal.h @@ -118,14 +118,8 @@ struct compact_control { unsigned long nr_freepages; /* Number of isolated free pages */ unsigned long nr_migratepages; /* Number of pages to migrate */ unsigned long free_pfn; /* isolate_freepages search base */ - unsigned long start_free_pfn; /* where we started the search */ unsigned long migrate_pfn; /* isolate_migratepages search base */ bool sync; /* Synchronous migration */ - bool wrapped; /* Order > 0 compactions are - incremental, once free_pfn - and migrate_pfn meet, we restart - from the top of the zone; - remember we wrapped around. */ int order; /* order a direct compactor needs */ int migratetype; /* MOVABLE, RECLAIMABLE etc */ |