md/raid10: submit bio directly to replacement disk (6d399783) · Commits · 戴 / test

Commit (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>

drivers/md/raid10.c

+16 −3

Original line number	Diff line number	Diff line
		@@ -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);
		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);
		}
		}

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