Re: [PATCH] tests: Disable migration-test

[Thomas Huth <thuth@redhat.com>]

On 21/02/2023 16.36, Dr. David Alan Gilbert wrote:
> * Peter Maydell (peter.maydell@linaro.org) wrote:
>> On Tue, 21 Feb 2023 at 15:21, Dr. David Alan Gilbert
>> <dgilbert@redhat.com> wrote:
>>> Damn this is really going to impact the stability of migration if we
>>> don't regularly test.
>>> But fundamentally, I've never been able to debug much of the reports
>>> that come from flakyness in gitlab ci; we're not getting the most basic
>>> information like which subtest or where we're upto in the test which
>>> makes it very very hard to debug.
>>
>> Right, but if you want more information you need to change the
>> tests and/or test harness to provide it.
> 
> I don't think the migration test is doing anything odd in that respect;
> We've just got a bunch of qtest tests; having a test framework which
> doesn't tell you which test failed is very difficult.

FWIW, I just saw another failure, on a s390x host,
last lines of the log are:

ok 10 /s390x/migration/postcopy/recovery/tls/psk
# End of tls tests
# End of recovery tests
# Start of preempt tests
# starting QEMU: exec ./qemu-system-s390x -qtest unix:/tmp/qtest-7847.sock -qtest-log /dev/null -chardev socket,path=/tmp/qtest-7847.qmp,id=char0 -mon chardev=char0,mode=control -display none -accel kvm -accel tcg -name source,debug-threads=on -m 128M -serial file:/tmp/migration-test-03MJ01/src_serial -bios /tmp/migration-test-03MJ01/bootsect    -accel qtest
# starting QEMU: exec ./qemu-system-s390x -qtest unix:/tmp/qtest-7847.sock -qtest-log /dev/null -chardev socket,path=/tmp/qtest-7847.qmp,id=char0 -mon chardev=char0,mode=control -display none -accel kvm -accel tcg -name target,debug-threads=on -m 128M -serial file:/tmp/migration-test-03MJ01/dest_serial -incoming unix:/tmp/migration-test-03MJ01/migsocket -bios /tmp/migration-test-03MJ01/bootsect    -accel qtest
ok 11 /s390x/migration/postcopy/preempt/plain
# Start of recovery tests
# starting QEMU: exec ./qemu-system-s390x -qtest unix:/tmp/qtest-7847.sock -qtest-log /dev/null -chardev socket,path=/tmp/qtest-7847.qmp,id=char0 -mon chardev=char0,mode=control -display none -accel kvm -accel tcg -name source,debug-threads=on -m 128M -serial file:/tmp/migration-test-03MJ01/src_serial -bios /tmp/migration-test-03MJ01/bootsect   2>/dev/null -accel qtest
# starting QEMU: exec ./qemu-system-s390x -qtest unix:/tmp/qtest-7847.sock -qtest-log /dev/null -chardev socket,path=/tmp/qtest-7847.qmp,id=char0 -mon chardev=char0,mode=control -display none -accel kvm -accel tcg -name target,debug-threads=on -m 128M -serial file:/tmp/migration-test-03MJ01/dest_serial -incoming unix:/tmp/migration-test-03MJ01/migsocket -bios /tmp/migration-test-03MJ01/bootsect   2>/dev/null -accel qtest
----------------------------------- stderr -----------------------------------
Broken pipe
../tests/qtest/libqtest.c:193: kill_qemu() detected QEMU death from signal 11 (Segmentation fault) (core dumped)

(test program exited with status code -6)

  Thomas