Merge "Restore I/O priority support" into main am: 749e2e8e2d

Original change: https://android-review.googlesource.com/c/platform/system/core/+/2944826

Change-Id: I0ae7e0f1ef9a6ccf484e33ed82f7c1fa8b522c06
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>
diff --git a/rootdir/init.rc b/rootdir/init.rc
index 4c07c83..0646d14 100644
--- a/rootdir/init.rc
+++ b/rootdir/init.rc
@@ -247,6 +247,7 @@
     write /dev/blkio/background/blkio.bfq.weight 10
     write /dev/blkio/blkio.group_idle 0
     write /dev/blkio/background/blkio.group_idle 0
+    write /dev/blkio/background/blkio.prio.class restrict-to-be
 
     restorecon_recursive /mnt