commit 54c8a2b73f516948e92e00d7036e141cecb163b1
author Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com> Wed Jan 15 14:23:20 2020 +0000
committer Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com> Wed Jan 15 14:23:20 2020 +0000
tree 98dc4523d7a9135fd5f11f42772fdd5427085195
parent cd1f80643799fff13e90f8f1af6d82ac7afe0ffd
parent 6adec724b891f0fb6b8627d33efcd3d15b9c8579

Merge "Disable dm-verity hash prefetching." am: e4505960b9 am: 4cde8c3eaa

Change-Id: I9d30f108fe340772ca7bd9e5e316da5150f3a3e6

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