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| author | Mikulas Patocka <mpatocka@redhat.com> | 2022-07-11 16:30:52 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-08-17 14:23:13 +0200 |
| commit | 3a2500b73a1792671ad00f332d0fc56730a301c1 (patch) | |
| tree | 1e88bbc5e7b29e4266c8e643f8c47ef980c2941a /drivers/md/dm-writecache.c | |
| parent | 880c4513eb3360d3ee86556331d9645d87ad2cbb (diff) | |
| download | linux-3a2500b73a1792671ad00f332d0fc56730a301c1.tar.gz linux-3a2500b73a1792671ad00f332d0fc56730a301c1.tar.bz2 linux-3a2500b73a1792671ad00f332d0fc56730a301c1.zip | |
dm writecache: count number of blocks read, not number of read bios
[ Upstream commit 2c6e755b49d273243431f5f1184654e71221fc78 ]
Change dm-writecache, so that it counts the number of blocks read
instead of the number of read 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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/md/dm-writecache.c')
| -rw-r--r-- | drivers/md/dm-writecache.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/md/dm-writecache.c b/drivers/md/dm-writecache.c index e3d0a9bb27b5..9d6b7b706a65 100644 --- a/drivers/md/dm-writecache.c +++ b/drivers/md/dm-writecache.c @@ -1364,6 +1364,7 @@ read_next_block: } } else { writecache_map_remap_origin(wc, bio, e); + wc->stats.reads += (bio->bi_iter.bi_size - wc->block_size) >> wc->block_size_bits; map_op = WC_MAP_REMAP_ORIGIN; } |