diff options
| author | Mikulas Patocka <mpatocka@redhat.com> | 2022-07-11 23:31:26 +0300 |
|---|---|---|
| committer | Mike Snitzer <snitzer@kernel.org> | 2022-07-14 22:53:25 +0300 |
| commit | b2676e1482af89714af6988ce5d31a84692e2530 (patch) | |
| tree | e24eccff92e8ddd05e9e9ae169bc53afbc22ed77 /drivers/md/dm-writecache.c | |
| parent | 2c6e755b49d273243431f5f1184654e71221fc78 (diff) | |
| download | linux-b2676e1482af89714af6988ce5d31a84692e2530.tar.xz | |
dm writecache: count number of blocks written, not number of write bios
Change dm-writecache, so that it counts the number of blocks written
instead of the number of write bios. Bios can be split and requeued
using the dm_accept_partial_bio function, so counting bios caused
inaccurate results.
Fixes: e3a35d03407c ("dm writecache: add event counters")
Reported-by: Yu Kuai <yukuai1@huaweicloud.com>
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
Diffstat (limited to 'drivers/md/dm-writecache.c')
| -rw-r--r-- | drivers/md/dm-writecache.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/drivers/md/dm-writecache.c b/drivers/md/dm-writecache.c index a551be5f9b4b..6282c77abe7b 100644 --- a/drivers/md/dm-writecache.c +++ b/drivers/md/dm-writecache.c @@ -1413,6 +1413,9 @@ static void writecache_bio_copy_ssd(struct dm_writecache *wc, struct bio *bio, bio->bi_iter.bi_sector = start_cache_sec; dm_accept_partial_bio(bio, bio_size >> SECTOR_SHIFT); + wc->stats.writes += bio->bi_iter.bi_size >> wc->block_size_bits; + wc->stats.writes_allocate += (bio->bi_iter.bi_size - wc->block_size) >> wc->block_size_bits; + if (unlikely(wc->uncommitted_blocks >= wc->autocommit_blocks)) { wc->uncommitted_blocks = 0; queue_work(wc->writeback_wq, &wc->flush_work); @@ -1428,9 +1431,10 @@ static enum wc_map_op writecache_map_write(struct dm_writecache *wc, struct bio do { bool found_entry = false; bool search_used = false; - wc->stats.writes++; - if (writecache_has_error(wc)) + if (writecache_has_error(wc)) { + wc->stats.writes += bio->bi_iter.bi_size >> wc->block_size_bits; return WC_MAP_ERROR; + } e = writecache_find_entry(wc, bio->bi_iter.bi_sector, 0); if (e) { if (!writecache_entry_is_committed(wc, e)) { @@ -1454,9 +1458,10 @@ static enum wc_map_op writecache_map_write(struct dm_writecache *wc, struct bio if (unlikely(!e)) { if (!WC_MODE_PMEM(wc) && !found_entry) { direct_write: - wc->stats.writes_around++; e = writecache_find_entry(wc, bio->bi_iter.bi_sector, WFE_RETURN_FOLLOWING); writecache_map_remap_origin(wc, bio, e); + wc->stats.writes_around += bio->bi_iter.bi_size >> wc->block_size_bits; + wc->stats.writes += bio->bi_iter.bi_size >> wc->block_size_bits; return WC_MAP_REMAP_ORIGIN; } wc->stats.writes_blocked_on_freelist++; @@ -1470,6 +1475,7 @@ direct_write: bio_copy: if (WC_MODE_PMEM(wc)) { bio_copy_block(wc, bio, memory_data(wc, e)); + wc->stats.writes++; } else { writecache_bio_copy_ssd(wc, bio, e, search_used); return WC_MAP_REMAP; |