commit 0586b934012ed2cd3cd0092a231ba8e7f87558f3
author Rick Yiu <rickyiu@google.com> Tue Apr 23 21:33:56 2019 +0800
committer Rick Yiu <rickyiu@google.com> Fri May 03 11:58:13 2019 +0800
tree fb6e7b707f9f99afbd13c6b31013e2cc43a01416
parent c270fb5edf0917178430f7c5c7c0ffe4f8ea5b77

Apply initial settings for blkio cgroup

Bug: 111422845
Test: values are applied
Change-Id: Id28d9619fc2fd2287fe656b8032025184ae7f631

rootdir/init.rc

diff --git a/rootdir/init.rc b/rootdir/init.rc
index 295e704..ba57ddd 100644
--- a/rootdir/init.rc
+++ b/rootdir/init.rc
@@ -80,7 +80,9 @@
     chmod 0664 /dev/stune/top-app/tasks
     chmod 0664 /dev/stune/rt/tasks
 
-    # Create blkio tuning nodes
+    # Create blkio group and apply initial settings.
+    # This feature needs kernel to support it, and the
+    # device's init.rc must actually set the correct values.
     mkdir /dev/blkio/background
     chown system system /dev/blkio
     chown system system /dev/blkio/background
@@ -88,6 +90,10 @@
     chown system system /dev/blkio/background/tasks
     chmod 0664 /dev/blkio/tasks
     chmod 0664 /dev/blkio/background/tasks
+    write /dev/blkio/blkio.weight 1000
+    write /dev/blkio/background/blkio.weight 500
+    write /dev/blkio/blkio.group_idle 0
+    write /dev/blkio/background/blkio.group_idle 0
 
     restorecon_recursive /mnt