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, Li Zhijian , "Dr. David Alan Gilbert" , Lukas Straub , Juan Quintela Subject: Re: [PATCH v8 00/17] migration: Add COLO multifd support and COLO migration unit test In-Reply-To: <87ecmjmsbm.fsf@suse.de> References: <20260210-colo_unit_test_multifd-v8-0-7f9e5f7d082b@web.de> <87ecmjmsbm.fsf@suse.de> Date: Tue, 17 Feb 2026 11:14:03 -0300 Message-ID: <87bjhnmp90.fsf@suse.de> MIME-Version: 1.0 Content-Type: text/plain X-Spamd-Result: default: False [-4.30 / 50.00]; BAYES_HAM(-3.00)[100.00%]; NEURAL_HAM_LONG(-1.00)[-1.000]; NEURAL_HAM_SHORT(-0.20)[-1.000]; MIME_GOOD(-0.10)[text/plain]; ARC_NA(0.00)[]; MISSING_XM_UA(0.00)[]; FREEMAIL_ENVRCPT(0.00)[gmail.com,web.de]; RCVD_VIA_SMTP_AUTH(0.00)[]; RCVD_TLS_ALL(0.00)[]; RCPT_COUNT_TWELVE(0.00)[12]; MIME_TRACE(0.00)[0:+]; FUZZY_RATELIMITED(0.00)[rspamd.com]; MID_RHS_MATCH_FROM(0.00)[]; TO_DN_SOME(0.00)[]; FROM_HAS_DN(0.00)[]; FREEMAIL_CC(0.00)[redhat.com,gmail.com,xfusion.com,fujitsu.com,treblig.org,web.de,trasno.org]; 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writes: > Lukas Straub writes: > >> Hello everyone, >> This has some cleanups for and adds multifd support and migration unit tests >> for COLO migration. >> >> Regards, >> Lukas >> >> Signed-off-by: Lukas Straub >> --- >> Changes in v8: >> - Fix peter's review comments >> - Link to v7: https://lore.kernel.org/qemu-devel/20260210-colo_unit_test_multifd-v7-0-23bd32f36828@web.de >> >> Changes in v7: >> - Fix peter's review comments >> - Link to v6: https://lore.kernel.org/qemu-devel/20260206-colo_unit_test_multifd-v6-0-27779dda139d@web.de >> >> Changes in v6: >> - Fix the crash when running COLO with TCG accel. >> - Link to v5: https://lore.kernel.org/qemu-devel/20260203-colo_unit_test_multifd-v5-0-57508b7389f6@web.de >> >> Changes in v5: >> - Remove unused inmports from multifd-colo.c >> - Mention the checkpoint overhead of reset to the Q35 fix >> - Link to v4: https://lore.kernel.org/qemu-devel/20260130-colo_unit_test_multifd-v4-0-7115ab6f0e77@web.de >> >> Changes in v4: >> - Add cleanup patches to remove migration_incoming_colo_enabled() and MIG_CMD_ENABLE_COLO >> - Add more comments to the colo unit test >> - Call colo_release_ram_cache() after multifd threads terminate >> - Link to v3: https://lore.kernel.org/qemu-devel/20260125-colo_unit_test_multifd-v3-0-ae926ccd8eae@web.de >> >> Changes in v3: >> - Fix peter's review comments. >> - Fix COLO with Q35 machine >> - Link to v2: https://lore.kernel.org/qemu-devel/20260117-colo_unit_test_multifd-v2-0-ab521777fa51@web.de >> >> Changes in v2: >> - Fix review comments >> - Hide stderr in colo migration test since the logged errors are expected >> - Add benchmarking data for multifd >> - Add myself as maintainer for COLO migration framework >> - Link to v1: https://lore.kernel.org/qemu-devel/20251230-colo_unit_test_multifd-v1-0-f9734bc74c71@web.de >> >> --- >> Lukas Straub (17): >> MAINTAINERS: Add myself as maintainer for COLO migration framework >> MAINTAINERS: Remove Hailiang Zhang from COLO migration framework >> colo: Setup ram cache in normal migration path >> colo: Replace migration_incoming_colo_enabled() with migrate_colo() >> colo: Remove ENABLE_COLO savevm command and mark it as deprecated >> ram: Remove colo special-casing >> multifd: Move ram state receive into multifd_ram_state_recv() >> multifd: Add COLO support >> Call colo_release_ram_cache() after multifd threads terminate >> colo: Fix crash during device vmstate load >> colo: Hold the BQL while sending ram state >> colo: Do not hold the BQL while receiving ram state. >> migration-test: Add COLO migration unit test >> Convert colo main documentation to restructuredText >> qemu-colo.rst: Miscellaneous changes >> qemu-colo.rst: Add my copyright >> qemu-colo.rst: Simplify the block replication setup >> >> MAINTAINERS | 6 +- >> docs/COLO-FT.txt | 334 ---------------------------------- >> docs/system/index.rst | 1 + >> docs/system/qemu-colo.rst | 362 +++++++++++++++++++++++++++++++++++++ >> include/migration/colo.h | 3 - >> migration/colo.c | 21 ++- >> migration/meson.build | 2 +- >> migration/migration.c | 61 ++----- >> migration/multifd-colo.c | 44 +++++ >> migration/multifd-colo.h | 26 +++ >> migration/multifd-nocomp.c | 10 +- >> migration/multifd.c | 19 +- >> migration/multifd.h | 5 +- >> migration/ram.c | 12 +- >> migration/savevm.c | 37 +--- >> migration/savevm.h | 1 - >> migration/trace-events | 1 - >> tests/qtest/meson.build | 7 +- >> tests/qtest/migration-test.c | 1 + >> tests/qtest/migration/colo-tests.c | 198 ++++++++++++++++++++ >> tests/qtest/migration/framework.h | 5 + >> 21 files changed, 720 insertions(+), 436 deletions(-) >> --- >> base-commit: 0b91040d23dc8820724a60c811223b777f3bc6b7 >> change-id: 20251230-colo_unit_test_multifd-8bf58dcebd46 >> >> Best regards, > > Queued, thanks Actually, I'm gonna drop it for now. Tests are failing non-deterministically, seems like a cleanup race due to yank. QTEST_QEMU_BINARY=./qemu-system-x86_64 ./tests/qtest/migration-test --full -p /x86_64/migration/colo/multifd/primary_failover_checkpoint ... ../tests/qtest/libqtest.c:201: kill_qemu() tried to terminate QEMU process but encountered exit status 1 (expected 0)