dm writecache: count number of blocks read, not number of read bios

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[ Upstream commit 2c6e755b49 ]

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: 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 16:30:52 -04:00 • committed by Greg Kroah-Hartman

parent d48fa0b504

commit 5fef35fc1a

2 changed files with 3 additions and 2 deletions

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4

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

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1

drivers/md/dm-writecache.c

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