Commit bb01b64c authored Jul 10, 2017 by zhenwei.pi Committed by Linus Torvalds Jul 10, 2017

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 <zhenwei.pi@youruncloud.com>
Cc: Gioh Kim <gi-oh.kim@profitbricks.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Cc: Rafael Aquini <aquini@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent e048cb32

mm/balloon_compaction.c

+1 −1

Original line number	Original line	Diff line number	Diff line
	@@ -24,7 +24,7 @@ struct page balloon_page_enqueue(struct balloon_dev_info b_dev_info)
	{		{
	unsigned long flags;		unsigned long flags;
	struct page *page = alloc_page(balloon_mapping_gfp_mask() \|		struct page *page = alloc_page(balloon_mapping_gfp_mask() \|
	__GFP_NOMEMALLOC \| __GFP_NORETRY);		__GFP_NOMEMALLOC \| __GFP_NORETRY \| __GFP_ZERO);
	if (!page)		if (!page)
	return NULL;		return NULL;