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md/raid10: submit bio directly to replacement disk 

commit 6d399783e9d4e9bd44931501948059d24ad96ff8 upstream.

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>
Signed-off-by: Willy Tarreau <w@1wt.eu>
This commit is contained in:
Shaohua Li 2017-02-23 12:26:41 -08:00 committed by syphyr
parent d696f0acb0
commit ceea44c672
1 changed files with 16 additions and 3 deletions
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19
drivers/md/raid10.c
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@ -1569,11 +1569,24 @@ retry_write:
mbio->bi_private = r10_bio;
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);
}
}