diff options
| author | Ming Lei <ming.lei@redhat.com> | 2022-04-12 16:56:12 +0800 |
|---|---|---|
| committer | Mike Snitzer <snitzer@kernel.org> | 2022-05-05 17:31:35 -0400 |
| commit | d3de6d12694de45dfb4d7821d09224ed43dde3d7 (patch) | |
| tree | 8339f320d3eadae3b21d35a07c1f984f438a8325 /drivers/md/dm.c | |
| parent | e6926ad0c988d4cf8d4f4ec77373572831149104 (diff) | |
| download | linux-d3de6d12694de45dfb4d7821d09224ed43dde3d7.tar.bz2 | |
dm: switch to bdev based IO accounting interfaces
DM splits flush with data into empty flush followed by bio with data
payload, switch dm_io_acct() to use bdev_{start,end}_io_acct() to do
this accoiunting more naturally (rather than temporarily changing the
bio's bi_size).
This will allow DM to more easily account bios that are split (in
following commit).
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
Diffstat (limited to 'drivers/md/dm.c')
| -rw-r--r-- | drivers/md/dm.c | 28 |
1 files changed, 13 insertions, 15 deletions
diff --git a/drivers/md/dm.c b/drivers/md/dm.c index 2b99ee2a6131..30578ee0cbe3 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -508,30 +508,28 @@ static void dm_io_acct(struct dm_io *io, bool end) unsigned long start_time = io->start_time; struct mapped_device *md = io->md; struct bio *bio = io->orig_bio; - bool is_flush_with_data; - unsigned int bi_size; + unsigned int sectors; - /* If REQ_PREFLUSH set save any payload but do not account it */ - is_flush_with_data = bio_is_flush_with_data(bio); - if (is_flush_with_data) { - bi_size = bio->bi_iter.bi_size; - bio->bi_iter.bi_size = 0; - } + /* + * If REQ_PREFLUSH set, don't account payload, it will be + * submitted (and accounted) after this flush completes. + */ + if (bio_is_flush_with_data(bio)) + sectors = 0; + else + sectors = bio_sectors(bio); if (!end) - bio_start_io_acct_time(bio, start_time); + bdev_start_io_acct(bio->bi_bdev, sectors, bio_op(bio), + start_time); else - bio_end_io_acct(bio, start_time); + bdev_end_io_acct(bio->bi_bdev, bio_op(bio), start_time); if (static_branch_unlikely(&stats_enabled) && unlikely(dm_stats_used(&md->stats))) dm_stats_account_io(&md->stats, bio_data_dir(bio), - bio->bi_iter.bi_sector, bio_sectors(bio), + bio->bi_iter.bi_sector, sectors, end, start_time, stats_aux); - - /* Restore bio's payload so it does get accounted upon requeue */ - if (is_flush_with_data) - bio->bi_iter.bi_size = bi_size; } static void __dm_start_io_acct(struct dm_io *io) |