Add comments explaining how secondary OTA works
Test: th
Change-Id: I72f890e3dcb6f8369dea8071da040b4c27877a2b
diff --git a/tools/releasetools/ota_from_target_files.py b/tools/releasetools/ota_from_target_files.py
index 043f6ee..39e380e 100755
--- a/tools/releasetools/ota_from_target_files.py
+++ b/tools/releasetools/ota_from_target_files.py
@@ -423,6 +423,13 @@
slot will be used. This is to ensure that we always have valid boot, vbmeta,
bootloader images in the inactive slot.
+ After writing system_other to inactive slot's system partiiton,
+ PackageManagerService will read `ro.cp_system_other_odex`, and set
+ `sys.cppreopt` to "requested". Then, according to
+ system/extras/cppreopts/cppreopts.rc , init will mount system_other at
+ /postinstall, and execute `cppreopts` to copy optimized APKs from
+ /postinstall to /data .
+
Args:
input_file: The input target-files.zip file.
skip_postinstall: Whether to skip copying the postinstall config file.