From b5319d40873f250b1286082a52cab4117b3cd00d 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 da91df50ba31a..9075aa54e9551 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; -- 2.39.5