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authorChanho Min <chanho.min@lge.com>2020-01-04 12:59:36 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2020-01-04 13:55:09 -0800
commitac8f05da5174c560de122c499ce5dfb5d0dfbee5 (patch)
treee88be16685158446a8a85cb03741ee55f8499e0b
parentfeee6b2989165631b17ac6d4ccdbf6759254e85a (diff)
downloadlinux-ac8f05da5174c560de122c499ce5dfb5d0dfbee5.tar.bz2
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: 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> 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>
-rw-r--r--mm/zsmalloc.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c
index 2b2b9aae8a3c..22d17ecfe7df 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;