* [PATCH] mm: balloon: enqueue zero page to balloon device
@ 2017-06-29 1:10 zhenwei.pi
0 siblings, 0 replies; only message in thread
From: zhenwei.pi @ 2017-06-29 1:10 UTC (permalink / raw)
To: akpm; +Cc: linux-mm, gi-oh.kim, vbabka, zhenwei.pi
Now, pages in balloon device have random value, and these pages
will be scanned by ksmd on host. They usually can not be merged.
Enqueue zero page will resolve this problem.
Signed-off-by: zhenwei.pi <zhenwei.pi@youruncloud.com>
---
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 da91df5..c29ebdc 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;
--
2.7.4
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