From: Chanho Min chanho.min@lge.com Subject: 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.co... 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 ---
mm/zsmalloc.c | 5 +++++ 1 file changed, 5 insertions(+)
--- a/mm/zsmalloc.c~mm-zsmallocc-fix-the-migrated-zspage-statistics +++ a/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; _