* [PATCH RESEND] mm/zsmalloc.c: fix the migrated zspage statistics.
@ 2019-12-04 4:47 Chanho Min
0 siblings, 0 replies; only message in thread
From: Chanho Min @ 2019-12-04 4:47 UTC (permalink / raw)
To: Minchan Kim, Nitin Gupta, Sergey Senozhatsky, Andrew Morton
Cc: linux-mm, linux-kernel, seungho1.park, Inkyu Hwang, Jinsuk Choi,
stable, Chanho Min
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.
Cc: <stable@vger.kernel.org> [4.9+]
Fixes: 91537fee0013 ("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>
---
mm/zsmalloc.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c
index 2b2b9aa..22d17ec 100644
--- a/mm/zsmalloc.c
+++ b/mm/zsmalloc.c
@@ -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;
--
2.7.4
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