From bb01b64cfab7c22f3848cb73dc0c2b46b8d38499 Mon Sep 17 00:00:00 2001 From: "zhenwei.pi" Date: Mon, 10 Jul 2017 15:49:47 -0700 Subject: [PATCH] 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@youruncloud.com Signed-off-by: zhenwei.pi Cc: Gioh Kim Cc: Vlastimil Babka Cc: Minchan Kim Cc: Konstantin Khlebnikov Cc: Rafael Aquini Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/balloon_compaction.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/balloon_compaction.c b/mm/balloon_compaction.c index da91df50ba31..9075aa54e955 100644 --- a/mm/balloon_compaction.c +++ b/mm/balloon_compaction.c @@ -24,7 +24,7 @@ struct page *balloon_page_enqueue(struct balloon_dev_info *b_dev_info) { 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;