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@kernel.org Signed-off-by: Minchan Kim <minchan@kernel.org> Reviewed-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -469,6 +469,7 @@ static bool zram_same_page_write(struct zram *zram, u32 index,
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zram_slot_unlock(zram, index);
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atomic64_inc(&zram->stats.same_pages);
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atomic64_inc(&zram->stats.pages_stored);
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return true;
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}
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kunmap_atomic(mem);
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@ -524,6 +525,7 @@ static void zram_free_page(struct zram *zram, size_t index)
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zram_clear_flag(zram, index, ZRAM_SAME);
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zram_set_element(zram, index, 0);
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atomic64_dec(&zram->stats.same_pages);
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atomic64_dec(&zram->stats.pages_stored);
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return;
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}
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