init: Use exec_background instead of exec
extra_free_kbytes.sh sometimes takes a long time to execute, especially
on some slower devices. We don't need to wait for its completion in this
script before continuing init execution. This saves up to 200ms boot
time on some slower device models.
Bug: http://b/383225735
Test: manual, bootperf over 100 iterations
Change-Id: I19e3566d71c0e6f57045e1475d20b68bc204b5a4
diff --git a/rootdir/init.rc b/rootdir/init.rc
index 1545d09..c25a9ac 100644
--- a/rootdir/init.rc
+++ b/rootdir/init.rc
@@ -1233,7 +1233,7 @@
# and chown/chmod does not work for /proc/sys/ entries.
# So proxy writes through init.
on property:sys.sysctl.extra_free_kbytes=*
- exec -- /system/bin/extra_free_kbytes.sh ${sys.sysctl.extra_free_kbytes}
+ exec_background -- /system/bin/extra_free_kbytes.sh ${sys.sysctl.extra_free_kbytes}
# Allow users to drop caches
on property:perf.drop_caches=3