Lukas Straub <lukasstra...@web.de> wrote:
> On Thu, 20 Apr 2023 12:20:25 +0200
> Juan Quintela <quint...@redhat.com> wrote:
>
>> Lukas Straub <lukasstra...@web.de> wrote:
>> > Add postcopy tests with compress enabled to ensure nothing breaks
>> > with the refactoring in the next commits.
>> >
>> > preempt+compress is blocked, so no test needed for that case.
>> >
>> > Signed-off-by: Lukas Straub <lukasstra...@web.de>
>>
>> Reviewed-by: Juan Quintela <quint...@redhat.com>
>>
>> And I wanted to removed the old compression code and it gets new users.
>> Sniff.
>
> Who know how many compress threads users are out there...
Not too much.
We broke it during development and nobody found it.
And the reason that I wrote the multifd-zlib compression code was
because I was not able to get a migration-test working with compression,
so ....
> By the way, I'm not against deprecating compress threads in the long
> run. I'm already working on (cleanly :)) adding colo support with
> multifd.
Ok, then I will still put the deprecate comment there.
>> > ---
>> > tests/qtest/migration-test.c | 83 +++++++++++++++++++++++-------------
>> > 1 file changed, 53 insertions(+), 30 deletions(-)
>> >
>> > diff --git a/tests/qtest/migration-test.c b/tests/qtest/migration-test.c
>> > index 1f2a019ce0..930cb4f29d 100644
>> > --- a/tests/qtest/migration-test.c
>> > +++ b/tests/qtest/migration-test.c
>> > @@ -1127,6 +1127,36 @@ test_migrate_tls_x509_finish(QTestState *from,
>> > #endif /* CONFIG_TASN1 */
>> > #endif /* CONFIG_GNUTLS */
>> >
>> > +static void *
>> > +test_migrate_compress_start(QTestState *from,
>> > + QTestState *to)
>> > +{
>> > + migrate_set_parameter_int(from, "compress-level", 1);
>> > + migrate_set_parameter_int(from, "compress-threads", 4);
>> > + migrate_set_parameter_bool(from, "compress-wait-thread", true);
>> > + migrate_set_parameter_int(to, "decompress-threads", 4);
>> > +
>> > + migrate_set_capability(from, "compress", true);
>> > + migrate_set_capability(to, "compress", true);
>> > +
>> > + return NULL;
>> > +}
>>
>> Independently of this patch, we need to change this test to use 4
>> compression tests and 3 decompression or anything that is not the same
>> number in both sides.
>>
>> I was complaining about this and when I arrived to the end of the path
>> found that this was code movement.
>>
>> Later, Juan.
>>
>
> Oops, forgot to mention, the test is based on this patch
> https://lore.kernel.org/qemu-devel/2f4abb67cf5f3e1591b2666676462a93bdd20bbc.1680618040.git.lukasstra...@web.de/
>
> Will probably carry the patch with this series then. So you mean 4
> compress _threads_ and 3 decompress _threads_?
Yeap.
Later, Juan.
