Avihai Horon 745c42912a vfio/migration: Add support for switchover ack capability ... Loading of a VFIO device's data can take a substantial amount of time as the device may need to allocate resources, prepare internal data structures, etc. This can increase migration downtime, especially for VFIO devices with a lot of resources. To solve this, VFIO migration uAPI defines "initial bytes" as part of its precopy data stream. Initial bytes can be used in various ways to improve VFIO migration performance. For example, it can be used to transfer device metadata to pre-allocate resources in the destination. However, for this to work we need to make sure that all initial bytes are sent and loaded in the destination before the source VM is stopped. Use migration switchover ack capability to make sure a VFIO device's initial bytes are sent and loaded in the destination before the source stops the VM and attempts to complete the migration. This can significantly reduce migration downtime for some devices. Signed-off-by: Avihai Horon <avihaih@nvidia.com> Reviewed-by: Cédric Le Goater <clg@redhat.com> Tested-by: YangHang Liu <yanghliu@redhat.com> Acked-by: Alex Williamson <alex.williamson@redhat.com> Signed-off-by: Cédric Le Goater <clg@redhat.com>		2023-06-30 06:02:51 +02:00
..
acpi-bits.rst	tests: Use separate virtual environment for avocado	2023-06-06 16:29:53 +02:00
atomics.rst	atomics: eliminate mb_read/mb_set	2023-06-06 09:42:14 +02:00
bitops.rst
blkdebug.txt
blkverify.txt
block-coroutine-wrapper.rst	block-coroutine-wrapper.py: introduce co_wrapper	2022-12-15 16:07:43 +01:00
build-system.rst	meson: Replace softmmu_ss -> system_ss	2023-06-20 10:01:30 +02:00
ci-definitions.rst.inc	tests/acceptance: rename tests acceptance to tests avocado	2021-11-08 17:00:22 +01:00
ci-jobs.rst.inc	gitlab: allow overriding name of the upstream repository	2023-06-26 08:58:02 +02:00
ci-runners.rst.inc	docs: name included files ".rst.inc"	2021-10-01 19:04:45 +02:00
ci.rst	docs/devel: clean-up the CI links in the docs	2022-06-01 18:55:04 +01:00
clocks.rst	clock: Provide builtin multiplier/divider	2021-09-01 11:08:19 +01:00
code-of-conduct.rst	docs/devel: add a maintainers section to development process	2022-11-22 09:49:07 +00:00
conflict-resolution.rst
control-flow-integrity.rst
decodetree.rst	docs: Document decodetree named field syntax	2023-05-30 10:55:39 -07:00
ebpf_rss.rst	docs/devel/ebpf_rss.rst: Format literals correctly	2021-08-02 11:42:38 +01:00
fuzzing.rst	docs/fuzz: remove mentions of fork-based fuzzing	2023-02-16 23:02:46 -05:00
index-api.rst	docs/zoned-storage: add zoned device documentation	2023-05-15 08:17:34 -04:00
index-build.rst	acpi/tests/avocado/bits/doc: add a doc file to describe the acpi bits test	2022-11-02 06:56:32 -04:00
index-internals.rst	docs/devel: start documenting writing VirtIO devices	2022-05-16 04:38:40 -04:00
index-process.rst	docs/devel: add a maintainers section to development process	2022-11-22 09:49:07 +00:00
index-tcg.rst	tcg: convert tcg/README to rst	2023-01-04 16:20:01 -08:00
index.rst	docs/devel: drop :hidden: and :includehidden: tags	2022-04-20 16:04:20 +01:00
kconfig.rst	docs: clarify --without-default-devices	2023-05-08 19:04:52 +02:00
loads-stores.rst	bswap: Add the ability to store to an unaligned 24 bit field	2023-06-22 18:55:14 -04:00
lockcnt.txt
maintainers.rst	docs/devel: add a maintainers section to development process	2022-11-22 09:49:07 +00:00
memory.rst	docs/devel: add some clarifying text for aliases	2022-01-18 12:56:29 +01:00
migration.rst	migration: Split save_live_pending() into state_pending_*	2023-02-06 19:22:56 +01:00
modules.rst	docs: Spell QEMU all caps	2021-11-19 10:16:58 +01:00
multi-process.rst	docs: Render binary names as monospaced text	2021-11-22 15:02:38 +01:00
multi-thread-tcg.rst	docs: Spell QEMU all caps	2021-11-19 10:16:58 +01:00
multiple-iothreads.txt	async: Add an optional reentrancy guard to the BH API	2023-04-28 11:31:07 +02:00
qapi-code-gen.rst	docs/interop: Convert qmp-spec.txt to rST	2023-05-22 10:21:01 +02:00
qgraph.rst	Fix some typos in documentation (found by codespell)	2021-11-22 15:02:38 +01:00
qom.rst	docs/devel: mention the spacing requirement for QOM	2023-04-27 14:58:51 +01:00
qtest.rst	tests: move libqtest.h back under qtest/	2022-05-03 15:16:51 +04:00
rcu.txt
replay.rst	docs: move replay docs to docs/system/replay.rst	2022-06-06 09:26:54 +02:00
reset.rst	hw/core/resettable: fix reset level counting	2022-10-27 10:27:23 +01:00
s390-dasd-ipl.rst
secure-coding-practices.rst
stable-process.rst	docs: Fix botched rST conversion of 'submitting-a-patch.rst'	2021-11-22 15:02:38 +01:00
style.rst	docs/style: call out the use of GUARD macros	2023-04-27 14:58:51 +01:00
submitting-a-patch.rst	docs/devel: try and improve the language around patch review	2022-11-22 09:52:23 +00:00
submitting-a-pull-request.rst	docs/devel: add a maintainers section to development process	2022-11-22 09:49:07 +00:00
tcg-icount.rst	tcg: Drop gen_io_end()	2021-09-08 11:09:45 +01:00
tcg-ops.rst	tcg: Add INDEX_op_qemu_{ld,st}_i128	2023-05-16 16:30:25 -07:00
tcg-plugins.rst	docs: add a new section to outline emulation support	2023-02-02 10:44:23 +00:00
tcg.rst	tcg: add perfmap and jitdump	2023-01-16 10:14:12 -10:00
testing.rst	docs/devel/testing: Update the 'Docker Debugging' section	2023-06-28 13:55:35 +02:00
tracing.rst	docs: trace-events-all is installed without renaming	2022-04-21 17:03:51 +04:00
trivial-patches.rst	docs: Fix botched rST conversion of 'submitting-a-patch.rst'	2021-11-22 15:02:38 +01:00
ui.rst	docs: Spell QEMU all caps	2021-11-19 10:16:58 +01:00
vfio-migration.rst	vfio/migration: Add support for switchover ack capability	2023-06-30 06:02:51 +02:00
virtio-backends.rst	docs/devel: start documenting writing VirtIO devices	2022-05-16 04:38:40 -04:00
virtio-migration.txt
writing-monitor-commands.rst	qapi: Start to elide redundant has_FOO in generated C	2022-12-13 18:31:37 +01:00
zoned-storage.rst	docs/zoned-storage:add zoned emulation use case	2023-05-15 08:19:04 -04:00