Re: [PULL 00/21] Migration 20230530 patches

[Juan Quintela <quintela@redhat.com>]

Richard Henderson <richard.henderson@linaro.org> wrote:
> On 5/30/23 11:25, Juan Quintela wrote:
>> The following changes since commit aa9bbd865502ed517624ab6fe7d4b5d89ca95e43:
>>    Merge tag 'pull-ppc-20230528' of https://gitlab.com/danielhb/qemu
>> into staging (2023-05-29 14:31:52 -0700)
>> are available in the Git repository at:
>>    https://gitlab.com/juan.quintela/qemu.git
>> tags/migration-20230530-pull-request
>> for you to fetch changes up to
>> c63c544005e6b1375a9c038f0e0fb8dfb8b249f4:
>>    migration/rdma: Check sooner if we are in postcopy for
>> save_page() (2023-05-30 19:23:50 +0200)
>> ----------------------------------------------------------------
>> Migration 20230530 Pull request (take 2)
>> Hi
>> Resend last PULL request, this time it compiles when CONFIG_RDMA is
>> not configured in.
>> [take 1]
>> On this PULL request:
>> - Set vmstate migration failure right (vladimir)
>> - Migration QEMUFileHook removal (juan)
>> - Migration Atomic counters (juan)
>> Please apply.
>> ----------------------------------------------------------------
>> Juan Quintela (16):
>>    migration: Don't abuse qemu_file transferred for RDMA
>>    migration/RDMA: It is accounting for zero/normal pages in two places
>>    migration/rdma: Remove QEMUFile parameter when not used
>>    migration/rdma: Don't use imaginary transfers
>>    migration: Remove unused qemu_file_credit_transfer()
>>    migration/rdma: Simplify the function that saves a page
>>    migration: Create migrate_rdma()
>>    migration/rdma: Unfold ram_control_before_iterate()
>>    migration/rdma: Unfold ram_control_after_iterate()
>>    migration/rdma: Remove all uses of RAM_CONTROL_HOOK
>>    migration/rdma: Unfold hook_ram_load()
>>    migration/rdma: Create rdma_control_save_page()
>>    qemu-file: Remove QEMUFileHooks
>>    migration/rdma: Move rdma constants from qemu-file.h to rdma.h
>>    migration/rdma: Remove qemu_ prefix from exported functions
>>    migration/rdma: Check sooner if we are in postcopy for save_page()
>> Vladimir Sementsov-Ogievskiy (5):
>>    runstate: add runstate_get()
>>    migration: never fail in global_state_store()
>>    runstate: drop unused runstate_store()
>>    migration: switch from .vm_was_running to .vm_old_state
>>    migration: restore vmstate on migration failure

Self nack

> Appears to introduce multiple avocado failures:
>
> https://gitlab.com/qemu-project/qemu/-/jobs/4378066518#L286
>
> Test summary:
> tests/avocado/migration.py:X86_64.test_migration_with_exec: ERROR

No clue what is going on here.
I haven't touched exec migration (famous last words)

> tests/avocado/migration.py:X86_64.test_migration_with_tcp_localhost:
> ERROR

This is tested by ./tests/migration-test

It passes for me with qemu-system-x86_64 (kvm), qemu-system-i386 (kvm)
and aarch64 (tcg).  What make check tests.

> tests/avocado/migration.py:X86_64.test_migration_with_unix: ERROR

Dunno again.

> make: *** [/builds/qemu-project/qemu/tests/Makefile.include:142: check-avocado] Error 1
>
> https://gitlab.com/qemu-project/qemu/-/jobs/4378066523#L387
>
> Test summary:
> tests/avocado/migration.py:X86_64.test_migration_with_tcp_localhost: ERROR
> tests/avocado/migration.py:X86_64.test_migration_with_unix: ERROR
> make: *** [/builds/qemu-project/qemu/tests/Makefile.include:142: check-avocado] Error 1
>
> Also fails QTEST_QEMU_BINARY=./qemu-system-aarch64 ./tests/qtest/migration-test
>
> ../src/migration/rdma.c:408:QIO_CHANNEL_RDMA: Object 0xaaaaf7bba680 is

This is something that changed on the series, so I will check with this
avocado tests.  No clue why it passes with x86_64 and not with aarch64.

> not an instance of type qio-channel-rdma

Here there was an error creating the RDMA channel somehow.  Somehow is
the important word on the previous sentence.

> qemu-system-aarch64: Not a migration stream
> qemu-system-aarch64: load of migration failed: Invalid argument
> Broken pipe

Will isolate the non RDMA changes and try to pass the RDMA ones through
avocado.

I am sorry for the noise.

Later, Juan.