Re: [PULL 00/21] Migration 20230530 patches

[Juan Quintela <quintela@redhat.com>]

Richard Henderson <richard.henderson@linaro.org> wrote:
> On 5/31/23 14:03, Juan Quintela wrote:
>> 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)
>>>> ----------------------------------------------------------------
>> Added Markus and Daniel.
>> 
>>>> 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
>>>
>>> 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
>>> 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
>>> 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
>>> not an instance of type qio-channel-rdma
>> I am looking at the other errors, but this one is weird.  It is
>> failing
>> here:
>> #define TYPE_QIO_CHANNEL_RDMA "qio-channel-rdma"
>> OBJECT_DECLARE_SIMPLE_TYPE(QIOChannelRDMA, QIO_CHANNEL_RDMA)
>> In the OBJECT line.
>> I have no clue what problem are we having here with the object
>> system to
>> decide at declaration time that a variable is not of the type that we
>> are declaring.
>> I am missing something obvious here?
>
> This is where the inline function is declared, but you need to look at
> the backtrace, where you have applied QIO_CHANNEL_RDMA to an object
> that is *not* of that type.

Where is the stack trace?

Are you running aarch64 natively?  Here running qemu-system-aarch64 on
x86_64 works for me.  Neither avocado test nor migration-test fails with
my changes.

Cleber found the reason why I was having trouble running avocado
locally.  It appears that some change happened and there are several
tests that can't be run in parallel.  (Temporary) solution is to run it
as:

make -j1 check-avocado

Until they sort which tests are/aren't able to run in parallel.

Later, Juan.