commit 6adec724b891f0fb6b8627d33efcd3d15b9c8579
author Martijn Coenen <maco@google.com> Wed Jan 15 06:05:48 2020 -0800
committer android-build-merger <android-build-merger@google.com> Wed Jan 15 06:05:48 2020 -0800
tree 98dc4523d7a9135fd5f11f42772fdd5427085195
parent 717297d12695675dc4215a7dd598a427f50e944a
parent 8d2c501ebf999694d61037af4848d050def73feb

Merge "Disable dm-verity hash prefetching."
am: e4505960b9

Change-Id: I844c05358e1d100feacb047124c975a4d86a23d8

rootdir/init.rc

diff --git a/rootdir/init.rc b/rootdir/init.rc
index b950bbd..737fffe 100644
--- a/rootdir/init.rc
+++ b/rootdir/init.rc
@@ -42,6 +42,10 @@
     mkdir /linkerconfig/bootstrap 0755
     mkdir /linkerconfig/default 0755
 
+    # Disable dm-verity hash prefetching, since it doesn't help performance
+    # Read more in b/136247322
+    write /sys/module/dm_verity/parameters/prefetch_cluster 0
+
     # Generate ld.config.txt for early executed processes
     exec -- /system/bin/linkerconfig --target /linkerconfig/bootstrap
     chmod 644 /linkerconfig/bootstrap/ld.config.txt