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mm/zsmalloc.c: fix the migrated zspage statistics.
commitac8f05da51
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:91537fee00
("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>
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@ -2069,6 +2069,11 @@ static int zs_page_migrate(struct address_space *mapping, struct page *newpage,
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zs_pool_dec_isolated(pool);
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}
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if (page_zone(newpage) != page_zone(page)) {
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dec_zone_page_state(page, NR_ZSPAGES);
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inc_zone_page_state(newpage, NR_ZSPAGES);
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}
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reset_page(page);
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put_page(page);
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page = newpage;
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