kvm  

Re: virtio BUG while assembling RAID1 across vd[ab]

Stefan Hajnoczi
Thu, 02 Sep 2010 22:32:16 -0700

On Thu, Sep 2, 2010 at 3:04 PM, martin f krafft <madd...@madduck.net> wrote:
>  Begin: Assembling all MD arrays ... [    4.711415] BUG: unable to handle 
> kernel NULL pointer dereference at 0000000000000078
>  [    4.715356] IP: [<ffffffffa0000074>] 
> virtio_check_driver_offered_feature+0xb/0x2c [virtio]
>  [    4.715356] PGD d516067 PUD c1f1067 PMD 0
>  [    4.715356] Oops: 0000 [#1] SMP
>  [    4.715356] last sysfs file: 
> /sys/devices/virtual/block/md99/md/dev-vdb/state
>  [    4.715356] CPU 0
>  [    4.715356] Modules linked in: sg sd_mod usb_storage sr_mod crc_t10dif 
> cdrom ata_generic virtio_net raid1 md_mod uhci_hcd ehci_hcd ata_piix 
> virtio_blk libata sym53c8xx scsi_transport_spi usbcore scsi_mod thermal 
> floppy thermal_sys virtio_pci nls_base virtio_ring virtio [last unloaded: 
> scsi_wait_scan]

Is this crash deterministic?  From your description it sounds like at
least the specific virtio device changes.  Does it sometimes boot
successfully?

Stefan
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