Eric Biggers <ebiggers@xxxxxxxxxx> 于2023年12月13日周三 12:45写道： > > 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 Changes are based on the master branch commit 9bacdd8996c7 (origin/master, origin/HEAD) Merge tag 'for-6.7-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux
