diff options
| author | Mikulas Patocka <mpatocka@redhat.com> | 2026-01-26 17:36:22 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2026-02-27 01:59:18 +0300 |
| commit | 1bd726fa8f5cf64568b4e49595e6c518eb64cd85 (patch) | |
| tree | d7b7373c0ee0f4b4baadcc8a6a1341c81798cb5d /drivers/md | |
| parent | d2138abc8f0a7fce4101b7229b43b06811ed083d (diff) | |
| download | linux-1bd726fa8f5cf64568b4e49595e6c518eb64cd85.tar.xz | |
dm: use bio_clone_blkg_association
[ Upstream commit 2df8b310bcfe76827fd71092f58a2493ee6590b0 ]
The origin bio carries blk-cgroup information which could be set from
foreground(task_css(css) - wbc->wb->blkcg_css), so the blkcg won't
control buffer io since commit ca522482e3eaf ("dm: pass NULL bdev to
bio_alloc_clone"). The synchronous io is still under control by blkcg,
because 'bio->bi_blkg' is set by io submitting task which has been added
into 'cgroup.procs'.
Fix it by using bio_clone_blkg_association when submitting a cloned bio.
Link: https://bugzilla.kernel.org/show_bug.cgi?id=220985
Fixes: ca522482e3eaf ("dm: pass NULL bdev to bio_alloc_clone")
Reported-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Tested-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/md')
| -rw-r--r-- | drivers/md/dm.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/md/dm.c b/drivers/md/dm.c index 6c83ab940af7..52f01c44e73a 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -1363,6 +1363,8 @@ void dm_submit_bio_remap(struct bio *clone, struct bio *tgt_clone) if (!tgt_clone) tgt_clone = clone; + bio_clone_blkg_association(tgt_clone, io->orig_bio); + /* * Account io->origin_bio to DM dev on behalf of target * that took ownership of IO with DM_MAPIO_SUBMITTED. |