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md/raid10: submit bio directly to replacement disk 

Commit 57c67df(md/raid10: submit IO from originating thread instead of
md thread) submits bio directly for normal disks but not for replacement
disks. There is no point we shouldn't do this for replacement disks.

Cc: NeilBrown <neilb@suse.com>
Signed-off-by: Shaohua Li <shli@fb.com>
hifive-unleashed-5.1
Shaohua Li 2017-02-23 12:26:41 -08:00
parent ea6200e841
commit 6d399783e9
1 changed files with 16 additions and 3 deletions
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19
drivers/md/raid10.c
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@ -1477,11 +1477,24 @@ retry_write:
mbio->bi_bdev = (void*)rdev;
atomic_inc(&r10_bio->remaining);
cb = blk_check_plugged(raid10_unplug, mddev,
sizeof(*plug));
if (cb)
plug = container_of(cb, struct raid10_plug_cb,
cb);
else
plug = NULL;
spin_lock_irqsave(&conf->device_lock, flags);
bio_list_add(&conf->pending_bio_list, mbio);
conf->pending_count++;
if (plug) {
bio_list_add(&plug->pending, mbio);
plug->pending_cnt++;
} else {
bio_list_add(&conf->pending_bio_list, mbio);
conf->pending_count++;
}
spin_unlock_irqrestore(&conf->device_lock, flags);
if (!mddev_check_plugged(mddev))
if (!plug)
md_wakeup_thread(mddev->thread);
}
}