Exactly the same sector number and length must be passed to both calls of
dm_stats_account_io, otherwise its per-zone in_flight counters go out of
sync. This patch fixes it.
Signed-off-by: Mikulas Patocka <mpatocka@xxxxxxxxxx>
---
drivers/md/dm.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
Index: linux-dm/drivers/md/dm.c
===================================================================
--- linux-dm.orig/drivers/md/dm.c 2022-02-11 15:32:56.000000000 +0100
+++ linux-dm/drivers/md/dm.c 2022-02-11 15:40:11.000000000 +0100
@@ -487,16 +487,20 @@ EXPORT_SYMBOL_GPL(dm_start_time_ns_from_
static void start_io_acct(struct dm_io *io, struct bio *bio)
{
+ struct bio *orig_bio;
+
/* Ensure IO accounting is only ever started once */
if (xchg(&io->was_accounted, 1) == 1)
return;
+ orig_bio = io->orig_bio;
+
bio_start_io_acct_remapped(bio, io->start_time,
- io->orig_bio->bi_bdev);
+ orig_bio->bi_bdev);
if (unlikely(dm_stats_used(&io->md->stats)))
- dm_stats_account_io(&io->md->stats, bio_data_dir(bio),
- bio->bi_iter.bi_sector, bio_sectors(bio),
+ dm_stats_account_io(&io->md->stats, bio_data_dir(orig_bio),
+ orig_bio->bi_iter.bi_sector, bio_sectors(orig_bio),
false, 0, &io->stats_aux);
}
--
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