Re: [PATCH v3 1/3] virtio-balloon: tweak config_changed implementation

[Wei Wang <wei.w.wang@intel.com>]

On 01/08/2019 04:46 PM, Christian Borntraeger wrote:
> On 08.01.2019 06:35, Wei Wang wrote:
> > On 01/07/2019 09:49 PM, Christian Borntraeger wrote:
> > > On 07.01.2019 08:01, Wei Wang wrote:
> > > > virtio-ccw has deadlock issues with reading the config space inside the
> > > > interrupt context, so we tweak the virtballoon_changed implementation
> > > > by moving the config read operations into the related workqueue contexts.
> > > > The config_read_bitmap is used as a flag to the workqueue callbacks
> > > > about the related config fields that need to be read.
> > > >
> > > > The cmd_id_received is also renamed to cmd_id_received_cache, and
> > > > the value should be obtained via virtio_balloon_cmd_id_received.
> > > >
> > > > Reported-by: Christian Borntraeger <borntraeger@de.ibm.com>
> > > > Signed-off-by: Wei Wang <wei.w.wang@intel.com>
> > > > Reviewed-by: Cornelia Huck <cohuck@redhat.com>
> > > > Reviewed-by: Halil Pasic <pasic@linux.ibm.com>
> > > Together with
> > >     virtio_pci: use queue idx instead of array idx to set up the vq
> > >     virtio: don't allocate vqs when names[i] = NULL
> > >
> > > Tested-by: Christian Borntraeger <borntraeger@de.ibm.com>
> > OK. I don't plan to send a new version of the above patches as no changes needed so far.
> >
> > Michael, if the above two patches look good to you, please help add the related tested-by
> > and reviewed-by tags. Thanks.
> Can we also make sure that
>
> virtio_pci: use queue idx instead of array idx to set up the vq
> virtio: don't allocate vqs when names[i] = NULL
>
> also land in stable?

You could also send the request to stable after it gets merged to Linus' 
tree.
The stable review committee will decide whether to take it.

Please see Option 2:

https://www.kernel.org/doc/html/latest/process/stable-kernel-rules.html


Best,
Wei