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| author | Alessio Balsini <balsini@google.com> | 2019-11-25 16:46:51 +0000 |
|---|---|---|
| committer | Yifan Hong <elsk@google.com> | 2019-12-04 04:02:20 +0000 |
| commit | 2a3b4a22eb6925326e439f820fa91a3976afac10 (patch) | |
| tree | 895d9d338377f0b8700c8d8352c16f397f9a3f85 /common/dynamic_partition_control_interface.h | |
| parent | 36e2289b82af548128191e7e8a0d94f0ce6bbe30 (diff) | |
Skip identical SOURCE_COPY operations
When Virtual A/B devices are updated, SOURCE_COPY operations that are
copying data from source to destination at the same locations:
- are useless;
- introduce an overhead for overwritingin identical data;
- increase the COW device size when using dm-snapshot.
This patch analyzes SOURCE_COPY operations and skips them if applied to
Virtual A/B devices and source and destination addresses are identical.
Bug: 141207436
Test: DynamicPartitionControlAndroidTest:ShouldSkipOperationTest
Depends-On: I146aeba1c8ede35f21cfef8e21d4af62274bda84
Change-Id: Ifec33abaf81b1d4cbd61533293735de68578c9c4
Signed-off-by: Alessio Balsini <balsini@google.com>
Diffstat (limited to 'common/dynamic_partition_control_interface.h')
0 files changed, 0 insertions, 0 deletions