Merge "rootdir/init.rc: enable iostat by default" am: 8d5bbec4c1

Original change: https://android-review.googlesource.com/c/platform/system/core/+/1371528

Change-Id: Ib1e8d9aaf6ed8dbdd0e5fac65152cdde39415f86
diff --git a/rootdir/init.rc b/rootdir/init.rc
index fb6f1be..fb58432 100644
--- a/rootdir/init.rc
+++ b/rootdir/init.rc
@@ -873,6 +873,7 @@
     # are not aware of using fsync()/sync() to prepare sudden power-cut.
     write /sys/fs/f2fs/${dev.mnt.blk.data}/cp_interval 200
     write /sys/fs/f2fs/${dev.mnt.blk.data}/gc_urgent_sleep_time 50
+    write /sys/fs/f2fs/${dev.mnt.blk.data}/iostat_enable 1
 
     # limit discard size to 128MB in order to avoid long IO latency
     # for filesystem tuning first (dm or sda)