The patch titled
Subject: mm/balloon_compaction: isolate balloon pages without lru_lock
has been added to the -mm tree. Its filename is
mm-balloon_compaction-isolate-balloon-pages-without-lru_lock.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-balloon_compaction-isolate-balloon-pages-without-lru_lock.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-balloon_compaction-isolate-balloon-pages-without-lru_lock.patch
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------------------------------------------------------
From: Konstantin Khlebnikov <k.khlebnikov@xxxxxxxxxxx>
Subject: mm/balloon_compaction: isolate balloon pages without lru_lock
LRU-lock isn't required for balloon page isolation. This check makes
migration of some ballooned pages mostly impossible because
isolate_migratepages_range() drops LRU lock periodically.
Signed-off-by: Konstantin Khlebnikov <k.khlebnikov@xxxxxxxxxxx>
Acked-by: Rafael Aquini <aquini@xxxxxxxxxx>
Cc: Andrey Ryabinin <ryabinin.a.a@xxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx> [v3.8+]
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/compaction.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN mm/compaction.c~mm-balloon_compaction-isolate-balloon-pages-without-lru_lock mm/compaction.c
--- a/mm/compaction.c~mm-balloon_compaction-isolate-balloon-pages-without-lru_lock
+++ a/mm/compaction.c
@@ -643,7 +643,7 @@ isolate_migratepages_block(struct compac
*/
if (!PageLRU(page)) {
if (unlikely(balloon_page_movable(page))) {
- if (locked && balloon_page_isolate(page)) {
+ if (balloon_page_isolate(page)) {
/* Successfully isolated */
goto isolate_success;
}
_
Patches currently in -mm which might be from k.khlebnikov@xxxxxxxxxxx are
mm-balloon_compaction-ignore-anonymous-pages.patch
mm-balloon_compaction-keep-ballooned-pages-away-from-normal-migration-path.patch
mm-balloon_compaction-isolate-balloon-pages-without-lru_lock.patch
mm-introduce-common-page-state-for-ballooned-memory.patch
mm-balloon_compaction-use-common-page-ballooning.patch
mm-balloon_compaction-general-cleanup.patch
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