Re: virtio_balloon regression in 5.19-rc3

From	David Hildenbrand <david@redhat.com>
Newsgroups	linux.debian.kernel
Subject	Re: virtio_balloon regression in 5.19-rc3
Date	2022-06-21 12:20 +0200
Message-ID	<EAJ9f-6fer-3@gated-at.bofh.it> (permalink)
References	<EAuMW-66wH-21@gated-at.bofh.it>
Organization	Red Hat

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On 20.06.22 20:49, Ben Hutchings wrote:
> I've tested a 5.19-rc3 kernel on top of QEMU/KVM with machine type
> pc-q35-5.2.  It has a virtio balloon device defined in libvirt as:
> 
>     <memballoon model="virtio">
>       <address type="pci" domain="0x0000" bus="0x05" slot="0x00" function="0x0"/>
>     </memballoon>
> 
> but the virtio_balloon driver fails to bind to it:
> 
>     virtio_balloon virtio4: init_vqs: add stat_vq failed
>     virtio_balloon: probe of virtio4 failed with error -5
> 

Hmm, I don't see any recent changes to drivers/virtio/virtio_balloon.c

virtqueue_add_outbuf() fails with -EIO if I'm not wrong. That's the
first call of virtqueue_add_outbuf() when virtio_balloon initializes.


Maybe something in generic virtio code changed?

-- 
Thanks,

David / dhildenb

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Re: virtio_balloon regression in 5.19-rc3 David Hildenbrand <david@redhat.com> - 2022-06-21 12:20 +0200
  Re: virtio_balloon regression in 5.19-rc3 Jason Wang <jasowang@redhat.com> - 2022-06-21 12:30 +0200
    Re: virtio_balloon regression in 5.19-rc3 Ben Hutchings <ben@decadent.org.uk> - 2022-06-21 18:20 +0200
      Re: virtio_balloon regression in 5.19-rc3 "Michael S. Tsirkin" <mst@redhat.com> - 2022-06-24 12:10 +0200
        Re: virtio_balloon regression in 5.19-rc3 Jason Wang <jasowang@redhat.com> - 2022-06-27 04:50 +0200

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