[PATCH 0/2] add io priority feature to work and use it in f2fs fsverity work

[Yi Sun]

Many works will go to submit_bio(). In many cases, the default
io priority of kworker cannot meet the real-time requirements of
the work. Such as f2fs_verify_bio work.

If a high-task-priority process reads the verity-file, it is likely
that the high-task-priority process will be slowly because the
kworker's io priority is too low.

Patch 1: Provide a set of interfaces for temporarily changing the
io priority of kworker.
Patch 2: Use the interfaces provided in patch1 to temporarily change
the io priority of f2fs_verify_bio work.

Yi Sun (2):
  workqueue: add io priority to work_struct
  f2fs: set f2fs verify work io priority

 fs/f2fs/data.c                  |  5 ++++
 include/linux/workqueue.h       |  9 ++++++
 include/linux/workqueue_types.h |  6 ++++
 kernel/workqueue.c              | 51 +++++++++++++++++++++++++++++++++
 4 files changed, 71 insertions(+)

-- 
2.25.1