From: "zhenwei.pi" <zhenwei.pi@xxxxxxxxxxxxxxx> Subject: mm/balloon_compaction.c: enqueue zero page to balloon device presently pages in the balloon device have random value, and these pages will be scanned by ksmd on the host. They usually cannot be merged. Enqueue zero pages will resolve this problem. Link: http://lkml.kernel.org/r/1498698637-26389-1-git-send-email-zhenwei.pi@xxxxxxxxxxxxxxx Signed-off-by: zhenwei.pi <zhenwei.pi@xxxxxxxxxxxxxxx> Cc: Gioh Kim <gi-oh.kim@xxxxxxxxxxxxxxxx> Cc: Vlastimil Babka <vbabka@xxxxxxx> Cc: Minchan Kim <minchan@xxxxxxxxxx> Cc: Konstantin Khlebnikov <khlebnikov@xxxxxxxxxxxxxx> Cc: Rafael Aquini <aquini@xxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/balloon_compaction.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff -puN mm/balloon_compaction.c~mm-balloon-enqueue-zero-page-to-balloon-device mm/balloon_compaction.c --- a/mm/balloon_compaction.c~mm-balloon-enqueue-zero-page-to-balloon-device +++ a/mm/balloon_compaction.c @@ -24,7 +24,7 @@ struct page *balloon_page_enqueue(struct { unsigned long flags; struct page *page = alloc_page(balloon_mapping_gfp_mask() | - __GFP_NOMEMALLOC | __GFP_NORETRY); + __GFP_NOMEMALLOC | __GFP_NORETRY | __GFP_ZERO); if (!page) return NULL; _ -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
