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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 /include/linux/mmzone.h
parentf40d1e42bb988d2a26e8e111ea4c4c7bac819b7e (diff)
downloadop-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 'include/linux/mmzone.h')
-rw-r--r--include/linux/mmzone.h4
1 files changed, 0 insertions, 4 deletions
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 85ac67a..16a4cc2 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -369,10 +369,6 @@ struct zone {
*/
spinlock_t lock;
int all_unreclaimable; /* All pages pinned */
-#if defined CONFIG_COMPACTION || defined CONFIG_CMA
- /* pfn where the last incremental compaction isolated free pages */
- unsigned long compact_cached_free_pfn;
-#endif
#ifdef CONFIG_MEMORY_HOTPLUG
/* see spanned/present_pages for more description */
seqlock_t span_seqlock;
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