On 12/3/20 6:22 PM, Thomas Huth 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?
>
>> Signed-off-by: Cornelia Huck <coh...@redhat.com>
>> ---
...
>> + 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.
"dmesg --follow"?
