The patch titled
Subject: zram: count same page write as page_stored
has been added to the -mm tree. Its filename is
zram-count-same-page-write-as-page_stored.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/zram-count-same-page-write-as-page_stored.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/zram-count-same-page-write-as-page_stored.patch
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From: Minchan Kim <minchan@xxxxxxxxxx>
Subject: zram: count same page write as page_stored
Regardless of whether it is same page or not, it's surely write and stored
to zram so we should increase pages_stored stat. Otherwise, user can see
zero value via mm_stats although he writes a lot of pages to zram.
Link: http://lkml.kernel.org/r/1494834068-27004-1-git-send-email-minchan@xxxxxxxxxx
Signed-off-by: Minchan Kim <minchan@xxxxxxxxxx>
Cc: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>
Cc: Sergey Senozhatsky <sergey.senozhatsky@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/block/zram/zram_drv.c | 2 ++
1 file changed, 2 insertions(+)
diff -puN drivers/block/zram/zram_drv.c~zram-count-same-page-write-as-page_stored drivers/block/zram/zram_drv.c
--- a/drivers/block/zram/zram_drv.c~zram-count-same-page-write-as-page_stored
+++ a/drivers/block/zram/zram_drv.c
@@ -516,6 +516,7 @@ static bool zram_same_page_write(struct
zram_slot_unlock(zram, index);
atomic64_inc(&zram->stats.same_pages);
+ atomic64_inc(&zram->stats.pages_stored);
return true;
}
kunmap_atomic(mem);
@@ -619,6 +620,7 @@ static void zram_free_page(struct zram *
zram_clear_flag(zram, index, ZRAM_SAME);
zram_set_element(zram, index, 0);
atomic64_dec(&zram->stats.same_pages);
+ atomic64_dec(&zram->stats.pages_stored);
return;
}
_
Patches currently in -mm which might be from minchan@xxxxxxxxxx are
zram-count-same-page-write-as-page_stored.patch
zram-do-not-count-duplicated-pages-as-compressed.patch
mm-thp-swap-unify-swap-slot-free-functions-to-put_swap_page.patch
mm-thp-swap-move-anonymous-thp-split-logic-to-vmscan.patch
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