Changes of root storage space unmounting time on Zygote Process
Zygote process forks every child process for launch the SystemServer and other
applications. When child process is forked, unmount storage inherited
from Zygote process is executed before it gains its own root storage
space.
If Zygote have no storage spaces, unmount operations not needed to
get relevant permission storage space.
Thus unmount is executed only once shortly before the SystemServer is forked.
And the child processes do not unmount its inherited root storage space.
Change-Id: I311ca7ea2c93085f42579f8cf8bdc7ef1d570a04
diff --git a/core/java/com/android/internal/os/Zygote.java b/core/java/com/android/internal/os/Zygote.java
index 919254a..66cc975 100644
--- a/core/java/com/android/internal/os/Zygote.java
+++ b/core/java/com/android/internal/os/Zygote.java
@@ -149,6 +149,12 @@
native private static int nativeForkSystemServer(int uid, int gid, int[] gids, int debugFlags,
int[][] rlimits, long permittedCapabilities, long effectiveCapabilities);
+ /**
+ * Zygote unmount storage space on initializing.
+ * This method is called once.
+ */
+ native protected static void nativeUnmountStorageOnInit();
+
private static void callPostForkChildHooks(int debugFlags, boolean isSystemServer,
String instructionSet) {
VM_HOOKS.postForkChild(debugFlags, isSystemServer, instructionSet);