BACKPORT: UPSTREAM: f2fs: sysfs: introduce critical_task_priority

This patch introduces /sys/fs/f2fs/<disk>/critical_task_priority, w/
this new sysfs interface, we can tune priority of f2fs_ckpt thread and
f2fs_gc thread.

Bug: 408202989
Change-Id: Ib841a5bd2e58cd8ec28cf3c21512021f2d81e69a
Signed-off-by: Chao Yu <[email protected]>
Signed-off-by: Jaegeuk Kim <[email protected]>
(cherry picked from commit 52190933c37a96164b271f3f30c16099d9eb8c09)
[Chao: fix the conflict in sysfs.c]
Signed-off-by: Chao Yu <[email protected]>
1 file changed