On Thu, 3 Dec 2020 18:22:35 +0100
Thomas Huth <th...@redhat.com> wrote:
> On 03/12/2020 16.39, Cornelia Huck wrote:
> > Hotplug a virtio-net-ccw device, and then hotunplug it again.
>
> Good idea! ... is it also possible with a pci device?
It should be, I guess; it's not part of my normal test workflow,
however.
>
> > Signed-off-by: Cornelia Huck <coh...@redhat.com>
> > ---
> >
> > This is on top of "tests/acceptance: enhance s390x devices test"
> >
> > ---
> > tests/acceptance/machine_s390_ccw_virtio.py | 14 ++++++++++++++
> > 1 file changed, 14 insertions(+)
> >
> > diff --git a/tests/acceptance/machine_s390_ccw_virtio.py
> > b/tests/acceptance/machine_s390_ccw_virtio.py
> > index 53b8484f8f9c..487c25c31d3c 100644
> > --- a/tests/acceptance/machine_s390_ccw_virtio.py
> > +++ b/tests/acceptance/machine_s390_ccw_virtio.py
> > @@ -97,3 +97,17 @@ class S390CCWVirtioMachine(Test):
> > exec_command_and_wait_for_pattern(self,
> > 'cat
> > /sys/bus/pci/devices/000a\:00\:00.0/function_id',
> > '0x0000000c')
> > + # add another device
> > + self.vm.command('device_add', driver='virtio-net-ccw',
> > + devno='fe.0.4711', id='xxx')
>
> Could we use a different id, please? xxx sounds so ... well, use your
> imagination.
It is taken straight from my usual testing workflow :) But yeah, I can
call this net_4711 or so.
>
> > + exec_command_and_wait_for_pattern(self, 'dmesg | tail -n 1',
> > 'CRW')
>
> That looks like it could be a little bit racy ... what if the kernel outputs
> another log message by chance, so that tail -n 1 reports that instead.
>
> I think it would be better to clear the dmesg log ("dmesg -c") before
> plugging, and then look at all the new output of "dmesg" without using
> "tail" afterwards.
Yes, good idea. Would need to do the same dance below as well (we get a
new crw).
>
> > + exec_command_and_wait_for_pattern(self, 'ls /sys/bus/ccw/devices/',
> > + '0.0.4711')
> > + # and detach it again
> > + self.vm.command('device_del', id='xxx')
> > + self.vm.event_wait(name='DEVICE_DELETED',
> > + match={'data': {'device': 'xxx'}})
> > + exec_command_and_wait_for_pattern(self, 'dmesg | tail -n 1',
> > 'CRW')
>
> dito
>
> > + exec_command_and_wait_for_pattern(self,
> > + 'ls
> > /sys/bus/ccw/devices/0.0.4711',
> > + 'No such file or directory')
> >
>
> Thomas
>
>
> PS: Another idea for a test: Looks like that initrd also has a
> virtio-balloon driver ... we could maybe start with "-device
> virito-balloon", then change the size of the balloon and check whether the
> MemTotal in /proc/meminfo changed...
Added to my to-test list.
Thanks!
