Enable io_uring feature for virtual A/B OTA
snapuserd: Use io_uring READ/WRITE opcodes for snapshot merge.
Specifically, it is used only for readahead and ordered ops
code path.
Snapshot merge perf:
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Incremental OTA of 300M between two git_master branches on Pixel 6:
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On Android S (with dm-snapshot): ~15 minutes:
update_engine: [INFO:cleanup_previous_update_action.cc(330)] Merge finished with state MergeCompleted.
update_engine: [INFO:cleanup_previous_update_action.cc(130)] Stopping/suspending/completing CleanupPreviousUpdateAction
update_engine: [INFO:cleanup_previous_update_action.cc(501)] Reporting merge stats: MergeCompleted in 926508ms (resumed 0 times), using 0 bytes of COW image.
===========================================================
On Android T (with io_uring: ~38 seconds):
update_engine: [INFO:cleanup_previous_update_action.cc(330)] Merge finished with state MergeCompleted.
update_engine: [INFO:cleanup_previous_update_action.cc(130)] Stopping/suspending/completing CleanupPreviousUpdateAction
update_engine: [INFO:cleanup_previous_update_action.cc(501)] Reporting merge stats: MergeCompleted in 38868ms (resumed 0 times), using 0 bytes of COW image.
===========================================================
Bug: 202784286
Test: Full/Incremental OTA
Signed-off-by: Akilesh Kailash <akailash@google.com>
Change-Id: Ia6efff32898cdc6b683ca49c233ef45e8cd732e7
diff --git a/target/product/virtual_ab_ota/compression.mk b/target/product/virtual_ab_ota/compression.mk
index 88c58b8..d5bd2a5 100644
--- a/target/product/virtual_ab_ota/compression.mk
+++ b/target/product/virtual_ab_ota/compression.mk
@@ -18,6 +18,7 @@
PRODUCT_VENDOR_PROPERTIES += ro.virtual_ab.compression.enabled=true
PRODUCT_VENDOR_PROPERTIES += ro.virtual_ab.userspace.snapshots.enabled=true
+PRODUCT_VENDOR_PROPERTIES += ro.virtual_ab.io_uring.enabled=true
PRODUCT_VIRTUAL_AB_COMPRESSION := true
PRODUCT_PACKAGES += \
snapuserd.vendor_ramdisk \