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.khlebni...@samsung.com> Cc: stable <sta...@vger.kernel.org> # v3.8 --- mm/compaction.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/compaction.c b/mm/compaction.c index 21bf292..0653f5f 100644 --- a/mm/compaction.c +++ b/mm/compaction.c @@ -597,7 +597,7 @@ isolate_migratepages_range(struct zone *zone, struct compact_control *cc, */ 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; } -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/