Commit ac8f05da authored Jan 04, 2020 by Chanho Min Committed by Linus Torvalds Jan 04, 2020

mm/zsmalloc.c: fix the migrated zspage statistics.

When zspage is migrated to the other zone, the zone page state should be
updated as well, otherwise the NR_ZSPAGE for each zone shows wrong
counts including proc/zoneinfo in practice.

Link: http://lkml.kernel.org/r/1575434841-48009-1-git-send-email-chanho.min@lge.com


Fixes: 91537fee ("mm: add NR_ZSMALLOC to vmstat")
Signed-off-by: Chanho Min <chanho.min@lge.com>
Signed-off-by: Jinsuk Choi <jjinsuk.choi@lge.com>
Reviewed-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Acked-by: Minchan Kim <minchan@kernel.org>
Cc: <stable@vger.kernel.org>        [4.9+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent feee6b29

mm/zsmalloc.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -2069,6 +2069,11 @@ static int zs_page_migrate(struct address_space mapping, struct page newpage,
		zs_pool_dec_isolated(pool);
		}

		if (page_zone(newpage) != page_zone(page)) {
		dec_zone_page_state(page, NR_ZSPAGES);
		inc_zone_page_state(newpage, NR_ZSPAGES);
		}

		reset_page(page);
		put_page(page);
		page = newpage;

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