On Mon, Aug 21, 2017 at 05:42:27PM +0200, David Sterba wrote:

The superblock is also metadata of the filesystem so the relevant IO
should be tagged as such. We also tag it as high priority, as it's the
last block committed for metadata from a given transaction. Any delays
would effectively block the whole transaction, also blocking any other
operation holding the device_list_mutex.

Signed-off-by: David Sterba <dsterba@suse.com>

Reviewed-by: Josef Bacik <redacted>

Thanks,

Josef