dm writecache: count number of blocks written, not number of write bios

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[ Upstream commit b2676e1482 ]

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: e3a35d0340 ("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>

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Mikulas Patocka 2022-07-11 16:31:26 -04:00 • committed by Greg Kroah-Hartman

parent 5fef35fc1a

commit f06cbeff23

2 changed files with 14 additions and 8 deletions

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10

Documentation/admin-guide/device-mapper/writecache.rst

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12

drivers/md/dm-writecache.c

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