Merge "Updating comments on cow layout" into main am: 1b52ac6efe am: 822c758b84 am: a800e97543 am: 139c4aaa36 am: 4f2d196d94
Original change: https://android-review.googlesource.com/c/platform/system/core/+/2754949
Change-Id: I69d423dd81406f146f5dead31c1069319e8a6654
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>
diff --git a/fs_mgr/libsnapshot/include/libsnapshot/cow_format.h b/fs_mgr/libsnapshot/include/libsnapshot/cow_format.h
index aac71de..9359b9e 100644
--- a/fs_mgr/libsnapshot/include/libsnapshot/cow_format.h
+++ b/fs_mgr/libsnapshot/include/libsnapshot/cow_format.h
@@ -49,7 +49,9 @@
// | Footer (fixed) |
// +-----------------------+
//
-// The operations begin immediately after the header, and the "raw data"
+// After the header is a 2mb scratch space that is used to read ahead data during merge operations
+//
+// The operations begin immediately after the scratch space, and the "raw data"
// immediately follows the operation which refers to it. While streaming
// an OTA, we can immediately write the op and data, syncing after each pair,
// while storing operation metadata in memory. At the end, we compute data and