On Tue, Dec 12, 2023 at 07:11:45PM +0800, Hongyu Jin wrote: > From: Hongyu Jin <hongyu.jin@xxxxxxxxxx> > > A high-priority task obtains data from the dm-verity device using the > RT IO priority, during the verification, the IO reading FEC and hash > by kworker loses the RT priority and is blocked by the low-priority IO. > dm-crypt has the same problem in the process of writing data. > > This is because io_context and blkcg are missing. > > Move bio_set_ioprio() into submit_bio(): > 1. Only call bio_set_ioprio() once to set the priority of original bio, > the bio that cloned and splited from original bio will auto inherit > the priority of original bio in clone process. > > 2. Make the IO priority of the original bio to be passed to dm, > and the dm target inherits the IO priority as needed. > What commit does this patch series apply to? - Eric
