Still LSI scsi problems with Windows guest and kvm 82?

Still LSI scsi problems with Windows guest and kvm 82?

[Roland Dreier]

I have a (32-bit) Windows XP guest installed, and if I start kvm-82
(from the Debian packages) on a 2.6.29-rc1 kernel (running 64-bit on an
AMD host), the guest boots but soon dies with messages along the lines
of:

    lsi_scsi: error: Unimplemented message 0x0c
    lsi_scsi: error: Reselect with pending DMA
    scsi-disk: Tag 0x0 already in use
    scsi-disk: Unsupported command length, command f0
    lsi_scsi: error: Unimplemented message 0x0c
    lsi_scsi: error: Reselect with pending DMA
    scsi-disk: Unsupported command length, command f0
    lsi_scsi: error: Reselect with pending DMA
    scsi-disk: Bad buffer tag 0x0

Is this a known problem?

 - R.

Re: Still LSI scsi problems with Windows guest and kvm 82?

[Ryan Harper]

* Roland Dreier <rdreier@cisco.com> [2009-01-13 16:43]:
> I have a (32-bit) Windows XP guest installed, and if I start kvm-82
> (from the Debian packages) on a 2.6.29-rc1 kernel (running 64-bit on an
> AMD host), the guest boots but soon dies with messages along the lines
> of:
> 
>     lsi_scsi: error: Unimplemented message 0x0c
>     lsi_scsi: error: Reselect with pending DMA
>     scsi-disk: Tag 0x0 already in use
>     scsi-disk: Unsupported command length, command f0
>     lsi_scsi: error: Unimplemented message 0x0c
>     lsi_scsi: error: Reselect with pending DMA
>     scsi-disk: Unsupported command length, command f0
>     lsi_scsi: error: Reselect with pending DMA
>     scsi-disk: Bad buffer tag 0x0
> 
> Is this a known problem?

Can you reproduce with the kvm release rather than debian packages?  I've
not seen this string of errors before.

-- 
Ryan Harper
Software Engineer; Linux Technology Center
IBM Corp., Austin, Tx
ryanh@us.ibm.com

Re: Still LSI scsi problems with Windows guest and kvm 82?

[Roland Dreier]

 > > I have a (32-bit) Windows XP guest installed, and if I start kvm-82
 > > (from the Debian packages) on a 2.6.29-rc1 kernel (running 64-bit on an
 > > AMD host), the guest boots but soon dies with messages along the lines
 > > of:
 > > 
 > >     lsi_scsi: error: Unimplemented message 0x0c
 > >     lsi_scsi: error: Reselect with pending DMA
 > >     scsi-disk: Tag 0x0 already in use
 > >     scsi-disk: Unsupported command length, command f0
 > >     lsi_scsi: error: Unimplemented message 0x0c
 > >     lsi_scsi: error: Reselect with pending DMA
 > >     scsi-disk: Unsupported command length, command f0
 > >     lsi_scsi: error: Reselect with pending DMA
 > >     scsi-disk: Bad buffer tag 0x0
 > > 
 > > Is this a known problem?
 > 
 > Can you reproduce with the kvm release rather than debian packages?  I've
 > not seen this string of errors before.

Indeed, it appears the Debian package's security/CVE-2007-5730.patch
patch causes the failure; the patch seems to be identical to
http://cvs.fedora.redhat.com/viewvc/devel/kvm/kvm-62-block-rw-range-check.patch?revision=1.7&view=markup

I haven't tried to debug what the issue is yet.

 - R.