diff options
| author | Yu Kuai <yukuai3@huawei.com> | 2023-05-29 21:11:04 +0800 |
|---|---|---|
| committer | Song Liu <song@kernel.org> | 2023-06-13 15:25:44 -0700 |
| commit | a022325ab970cf04b66ca128a87345714aa44b99 (patch) | |
| tree | db2f8e093f6dbe631cc3bedd27e11887a073a403 /drivers/md/md.h | |
| parent | 7db922bae3abdf0a1db81ef7228cc0b996a0c1e3 (diff) | |
md/md-bitmap: add a new helper to unplug bitmap asynchrously
If bitmap is enabled, bitmap must update before submitting write io, this
is why unplug callback must move these io to 'conf->pending_io_list' if
'current->bio_list' is not empty, which will suffer performance
degradation.
A new helper md_bitmap_unplug_async() is introduced to submit bitmap io
in a kworker, so that submit bitmap io in raid10_unplug() doesn't require
that 'current->bio_list' is empty.
This patch prepare to limit the number of plugged bio.
Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Signed-off-by: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20230529131106.2123367-6-yukuai1@huaweicloud.com
Diffstat (limited to 'drivers/md/md.h')
| -rw-r--r-- | drivers/md/md.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/md/md.h b/drivers/md/md.h index a50122165fa1..bfd2306bc750 100644 --- a/drivers/md/md.h +++ b/drivers/md/md.h @@ -852,6 +852,7 @@ struct mdu_array_info_s; struct mdu_disk_info_s; extern int mdp_major; +extern struct workqueue_struct *md_bitmap_wq; void md_autostart_arrays(int part); int md_set_array_info(struct mddev *mddev, struct mdu_array_info_s *info); int md_add_new_disk(struct mddev *mddev, struct mdu_disk_info_s *info); |