Merge "rootdir: init.rc to limit discard size to 128MB" am: 7bf14bb932
am: 0fe0ae2e2c
Change-Id: I972c1d37b4c72528af899945948c684b57597ff7
diff --git a/rootdir/init.rc b/rootdir/init.rc
index ff68734..e2ecad4 100644
--- a/rootdir/init.rc
+++ b/rootdir/init.rc
@@ -770,6 +770,11 @@
write /sys/fs/f2fs/${dev.mnt.blk.data}/cp_interval 200
write /sys/fs/f2fs/${dev.mnt.blk.data}/gc_urgent_sleep_time 50
+ # limit discard size to 128MB in order to avoid long IO latency
+ # for filesystem tuning first (dm or sda)
+ # Note that, if dm-<num> is used, sda/mmcblk0 should be tuned in vendor/init.rc
+ write /sys/devices/virtual/block/${dev.mnt.blk.data}/queue/discard_max_bytes 134217728
+
# Permissions for System Server and daemons.
chown system system /sys/power/autosleep