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authorMel Gorman <mgorman@suse.de>2012-10-08 16:32:40 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-10-09 16:22:50 +0900
commit753341a4b85ff337487b9959c71c529f522004f4 (patch)
tree6a705fd73dd599e7eeb58cb06e84c86c07c03a64 /mm/internal.h
parentf40d1e42bb988d2a26e8e111ea4c4c7bac819b7e (diff)
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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.h6
1 files changed, 0 insertions, 6 deletions
diff --git a/mm/internal.h b/mm/internal.h
index 97664be2ca3..6f6bb9ab938 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 */