Re: [PATCH v6 2/2] misc: Add a mechanism to detect stalls on guest vCPUs

[Guenter Roeck]

On 6/16/22 09:01, Sebastian Ene wrote:
> On Thu, Jun 16, 2022 at 12:08:55PM +0200, Greg Kroah-Hartman wrote:
> > On Thu, Jun 16, 2022 at 09:27:39AM +0000, Sebastian Ene wrote:
> > > This driver creates per-cpu hrtimers which are required to do the
> > > periodic 'pet' operation. On a conventional watchdog-core driver, the
> > > userspace is responsible for delivering the 'pet' events by writing to
> > > the particular /dev/watchdogN node. In this case we require a strong
> > > thread affinity to be able to account for lost time on a per vCPU.
> > >
> > > This part of the driver is the 'frontend' which is reponsible for
> > > delivering the periodic 'pet' events, configuring the virtual peripheral
> > > and listening for cpu hotplug events. The other part of the driver
> > > handles the peripheral emulation and this part accounts for lost time by
> > > looking at the /proc/{}/task/{}/stat entries and is located here:
> > > https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/3548817
> > >
> > > Reported-by: kernel test robot <lkp@xxxxxxxxx>
>
> Hi,
>
> > The robot reported stalls on vcpus?
> >
> > I think you need to fix this up...
>
> The robot reported some issues on v5 and after fixing them it
> recommended to add this tag.

Only that doesn't make sense for patch sets which are still being worked
on. If you want to credit the robot, mention it in the change log.

Guenter