diff options
| author | Yu Kuai <yukuai3@huawei.com> | 2023-05-29 15:11:04 +0200 |
|---|---|---|
| committer | Song Liu <song@kernel.org> | 2023-06-14 00:25:44 +0200 |
| commit | a022325ab970cf04b66ca128a87345714aa44b99 (patch) | |
| tree | db2f8e093f6dbe631cc3bedd27e11887a073a403 /drivers/md/md-bitmap.h | |
| parent | md/raid1-10: submit write io directly if bitmap is not enabled (diff) | |
| download | linux-a022325ab970cf04b66ca128a87345714aa44b99.tar.xz linux-a022325ab970cf04b66ca128a87345714aa44b99.zip | |
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-bitmap.h')
| -rw-r--r-- | drivers/md/md-bitmap.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/md/md-bitmap.h b/drivers/md/md-bitmap.h index 3a4750952b3a..8a3788c9bfef 100644 --- a/drivers/md/md-bitmap.h +++ b/drivers/md/md-bitmap.h @@ -264,6 +264,7 @@ void md_bitmap_sync_with_cluster(struct mddev *mddev, sector_t new_lo, sector_t new_hi); void md_bitmap_unplug(struct bitmap *bitmap); +void md_bitmap_unplug_async(struct bitmap *bitmap); void md_bitmap_daemon_work(struct mddev *mddev); int md_bitmap_resize(struct bitmap *bitmap, sector_t blocks, |