On Mon, Oct 18, 2021 at 10:26:18PM +0800, Coly Li wrote: > On 10/18/21 2:09 PM, Christoph Hellwig wrote: >> Just use the %pg format specifier to print the name directly. > > Hi Christoph, > > NACK for this patch. The buffer cache_dev_name is added on purpose, in > case ca->bdev cannot be referenced correctly for some special condition > when underlying device fails. Where exactly? ->bdev is never cleared and only dropped after we waited for the I/O to complete.