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| author | Mel Gorman <mgorman@suse.de> | 2012-10-08 16:32:40 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-10-09 16:22:50 +0900 |
| commit | 753341a4b85ff337487b9959c71c529f522004f4 (patch) | |
| tree | 6a705fd73dd599e7eeb58cb06e84c86c07c03a64 /mm/page_alloc.c | |
| parent | f40d1e42bb988d2a26e8e111ea4c4c7bac819b7e (diff) | |
| download | op-kernel-dev-753341a4b85ff337487b9959c71c529f522004f4.zip op-kernel-dev-753341a4b85ff337487b9959c71c529f522004f4.tar.gz | |
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/page_alloc.c')
| -rw-r--r-- | mm/page_alloc.c | 5 |
1 files changed, 0 insertions, 5 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index ca002b3..628968c 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -4490,11 +4490,6 @@ static void __paginginit free_area_init_core(struct pglist_data *pgdat, zone->spanned_pages = size; zone->present_pages = realsize; -#if defined CONFIG_COMPACTION || defined CONFIG_CMA - zone->compact_cached_free_pfn = zone->zone_start_pfn + - zone->spanned_pages; - zone->compact_cached_free_pfn &= ~(pageblock_nr_pages-1); -#endif #ifdef CONFIG_NUMA zone->node = nid; zone->min_unmapped_pages = (realsize*sysctl_min_unmapped_ratio) |
