Commit bb086a89 authored by Shaohua Li's avatar Shaohua Li

md: set rotational bit

if all disks in an array are non-rotational, set the array
non-rotational.

This only works for array with all disks populated at startup. Support
for disk hotadd/hotremove could be added later if necessary.
Acked-by: default avatarTejun Heo <tj@kernel.org>
Signed-off-by: default avatarShaohua Li <shli@fb.com>
parent 099b548c
......@@ -5297,6 +5297,21 @@ int md_run(struct mddev *mddev)
return err;
}
if (mddev->queue) {
bool nonrot = true;
rdev_for_each(rdev, mddev) {
if (rdev->raid_disk >= 0 &&
!blk_queue_nonrot(bdev_get_queue(rdev->bdev))) {
nonrot = false;
break;
}
}
if (mddev->degraded)
nonrot = false;
if (nonrot)
queue_flag_set_unlocked(QUEUE_FLAG_NONROT, mddev->queue);
else
queue_flag_clear_unlocked(QUEUE_FLAG_NONROT, mddev->queue);
mddev->queue->backing_dev_info.congested_data = mddev;
mddev->queue->backing_dev_info.congested_fn = md_congested;
}
......
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