| From | Greg Kroah-Hartman <> | Subject | [PATCH 5.4 084/191] mm/zsmalloc.c: fix the migrated zspage statistics. | Date | Tue, 7 Jan 2020 21:53:24 +0100 |
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From: Chanho Min <chanho.min@lge.com>
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@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> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- mm/zsmalloc.c | 5 +++++ 1 file changed, 5 insertions(+)
--- a/mm/zsmalloc.c +++ b/mm/zsmalloc.c @@ -2069,6 +2069,11 @@ 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;
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