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| author | Sergey Senozhatsky <sergey.senozhatsky@gmail.com> | 2014-04-07 15:38:02 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-04-07 16:35:59 -0700 |
| commit | b7cccf8b4009bf74df61f3c9d86b95fabd807c11 (patch) | |
| tree | abf371c2142897309d8c292f1d87422422c612f1 /drivers/block | |
| parent | be257c61306750d11c20d2ac567bf63304c696a3 (diff) | |
| download | blackbird-op-linux-b7cccf8b4009bf74df61f3c9d86b95fabd807c11.tar.gz blackbird-op-linux-b7cccf8b4009bf74df61f3c9d86b95fabd807c11.zip | |
zram: remove good and bad compress stats
Remove `good' and `bad' compressed sub-requests stats. RW request may
cause a number of RW sub-requests. zram used to account `good' compressed
sub-queries (with compressed size less than 50% of original size), `bad'
compressed sub-queries (with compressed size greater that 75% of original
size), leaving sub-requests with compression size between 50% and 75% of
original size not accounted and not reported. zram already accounts each
sub-request's compression size so we can calculate real device compression
ratio.
Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Acked-by: Minchan Kim <minchan@kernel.org>
Acked-by: Jerome Marchand <jmarchan@redhat.com>
Cc: Nitin Gupta <ngupta@vflare.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/block')
| -rw-r--r-- | drivers/block/zram/zram_drv.c | 11 | ||||
| -rw-r--r-- | drivers/block/zram/zram_drv.h | 2 |
2 files changed, 0 insertions, 13 deletions
diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c index 3f0d6de36f74..995304ef40bb 100644 --- a/drivers/block/zram/zram_drv.c +++ b/drivers/block/zram/zram_drv.c @@ -293,7 +293,6 @@ static void zram_free_page(struct zram *zram, size_t index) { struct zram_meta *meta = zram->meta; unsigned long handle = meta->table[index].handle; - u16 size = meta->table[index].size; if (unlikely(!handle)) { /* @@ -307,14 +306,8 @@ static void zram_free_page(struct zram *zram, size_t index) return; } - if (unlikely(size > max_zpage_size)) - atomic_dec(&zram->stats.bad_compress); - zs_free(meta->mem_pool, handle); - if (size <= PAGE_SIZE / 2) - atomic_dec(&zram->stats.good_compress); - atomic64_sub(meta->table[index].size, &zram->stats.compr_size); atomic_dec(&zram->stats.pages_stored); @@ -478,7 +471,6 @@ static int zram_bvec_write(struct zram *zram, struct bio_vec *bvec, u32 index, } if (unlikely(clen > max_zpage_size)) { - atomic_inc(&zram->stats.bad_compress); clen = PAGE_SIZE; src = NULL; if (is_partial_io(bvec)) @@ -518,9 +510,6 @@ static int zram_bvec_write(struct zram *zram, struct bio_vec *bvec, u32 index, /* Update stats */ atomic64_add(clen, &zram->stats.compr_size); atomic_inc(&zram->stats.pages_stored); - if (clen <= PAGE_SIZE / 2) - atomic_inc(&zram->stats.good_compress); - out: if (locked) mutex_unlock(&meta->buffer_lock); diff --git a/drivers/block/zram/zram_drv.h b/drivers/block/zram/zram_drv.h index e81e9cdf4147..2f173cb1fd0a 100644 --- a/drivers/block/zram/zram_drv.h +++ b/drivers/block/zram/zram_drv.h @@ -78,8 +78,6 @@ struct zram_stats { atomic64_t notify_free; /* no. of swap slot free notifications */ atomic_t pages_zero; /* no. of zero filled pages */ atomic_t pages_stored; /* no. of pages currently stored */ - atomic_t good_compress; /* % of pages with compression ratio<=50% */ - atomic_t bad_compress; /* % of pages with compression ratio>=75% */ }; struct zram_meta { |
