This is a note to let you know that I've just added the patch titled
mm/zsmalloc.c: fix the migrated zspage statistics.
to the 4.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
mm-zsmalloc.c-fix-the-migrated-zspage-statistics.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From ac8f05da5174c560de122c499ce5dfb5d0dfbee5 Mon Sep 17 00:00:00 2001
From: Chanho Min <chanho.min@xxxxxxx>
Date: Sat, 4 Jan 2020 12:59:36 -0800
Subject: mm/zsmalloc.c: fix the migrated zspage statistics.
From: Chanho Min <chanho.min@xxxxxxx>
commit ac8f05da5174c560de122c499ce5dfb5d0dfbee5 upstream.
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@xxxxxxx
Fixes: 91537fee0013 ("mm: add NR_ZSMALLOC to vmstat")
Signed-off-by: Chanho Min <chanho.min@xxxxxxx>
Signed-off-by: Jinsuk Choi <jjinsuk.choi@xxxxxxx>
Reviewed-by: Sergey Senozhatsky <sergey.senozhatsky@xxxxxxxxx>
Acked-by: Minchan Kim <minchan@xxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx> [4.9+]
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
mm/zsmalloc.c | 5 +++++
1 file changed, 5 insertions(+)
--- a/mm/zsmalloc.c
+++ b/mm/zsmalloc.c
@@ -2092,6 +2092,11 @@ static int zs_page_migrate(struct addres
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;
Patches currently in stable-queue which might be from chanho.min@xxxxxxx are
queue-4.19/mm-zsmalloc.c-fix-the-migrated-zspage-statistics.patch
