commit a7e8d8fe3acc130814f5c9a4d1d1bda394080f47
author Randall Huang <huangrandall@google.com> Fri Jan 03 15:35:46 2020 +0800
committer Cyan_Hsieh <cyanhsieh@google.com> Fri May 29 01:23:09 2020 +0800
tree e34692711959385b7c3012a533d0c40045ec081f
parent d7bae3a5361fabddcc083cb55df7e8f46e4cffbb

init.recovery.device.rc: limit discard size to 128MB

limit UFS discard size to avoid UFS unmap timeout issue

Bug: 146203801
Test: print log in recovery mode
Change-Id: I484b44abc1e14a19a7dd753e927c52af3565fe65
Signed-off-by: Randall Huang <huangrandall@google.com>

init.recovery.device.rc

diff --git a/init.recovery.device.rc b/init.recovery.device.rc
index 092221a..72fc15a 100644
--- a/init.recovery.device.rc
+++ b/init.recovery.device.rc
@@ -8,3 +8,7 @@
     write /sys/module/msm_poweroff/parameters/warm_reset 1
     # Enable thermal mitigation
     write /sys/devices/virtual/thermal/tz-by-name/backup-charge/mode enabled
+
+    # Block layer tuning: discard chunk size up to 128MB
+    # Otherwise, contiguous discards can be merged
+    write /sys/block/sda/queue/discard_max_bytes 134217728