commit 1a28dfb184450ccf6e3ea191e21138394a2de000
author Srinivas Paladugu <srnvs@google.com> Wed Jan 09 11:28:59 2019 -0800
committer Srinivas Paladugu <srnvs@google.com> Wed Jan 16 20:54:58 2019 -0800
tree 2ad77892b1748be03e78f564176e6d55e8974b4c
parent b23bd0162ae24c9f62cc663182f069025194fdb3

Allow write access to system_server on zram sysfs

System server needs to be able to write to idle and
writeback nodes in the zram sysfs directory.

Bug: 117682284
Bug: 122674343
Test: Test writeback on go ref device
Change-Id: I1cd663b73a7ebb255fe7e459601e720961bbd69e

rootdir/init.rc

diff --git a/rootdir/init.rc b/rootdir/init.rc
index 9b20964..026dbed 100644
--- a/rootdir/init.rc
+++ b/rootdir/init.rc
@@ -643,6 +643,12 @@
     chown root system /sys/module/lowmemorykiller/parameters/minfree
     chmod 0664 /sys/module/lowmemorykiller/parameters/minfree
 
+    # System server manages zram writeback
+    chown root system /sys/block/zram0/idle
+    chmod 0664 /sys/block/zram0/idle
+    chown root system /sys/block/zram0/writeback
+    chmod 0664 /sys/block/zram0/writeback
+
     # Tweak background writeout
     write /proc/sys/vm/dirty_expire_centisecs 200
     write /proc/sys/vm/dirty_background_ratio  5