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Re: [Xen-users] Shutting down domU causes "hda: interrupt lost" on dom0

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Subject: Re: [Xen-users] Shutting down domU causes "hda: interrupt lost" on dom0 and freezes the box.
From: Mark Williamson <mark.williamson@xxxxxxxxxxxx>
Date: Tue, 29 Apr 2008 19:21:18 +0100
Cc: "Jamie J. Begin" <begin@xxxxxxxxxxxxxxx>
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> When I try to reboot dom0, it switches to runlevel 6 and the xen init.d
> script attempts to stop a domU containing an Asterisk installation.  It's
> at that point I get an "hda: interrupt lost" on the physical console.  SSH
> become inaccessible and eventually the system pukes up a bunch of ext3 and
> RAID controller related errors and freezes.  I have to physically power
> cycle the box to get it back up.

Ugh, that's nasty :-(

> I suspect that a PCIe telephony card that I'm passing to the domU using
> pciback is the source of the problem.  The card is a Digium AEX800 (which
> is actually a PCIe version of Digium's PCI-based TDM800P). Based on some
> preliminary testing, the card seems to function just fine in the domU.
> lspci output is:

I was actually just thinking "I wonder if he's using PCI passthrough" ;-)

A few thoughts spring to mind:

1) Any idea if this is happening during a normal shutdown of the domU or if 
that shutdown is timing out, resulting in the domain being rudely destroyed?

2) Is there any chance that the domains are being suspended rather than 
shutdown?  That might do funny things...

3) Does this happen if you manually shutdown the domain?  if you manually 
destroy the domain?

It's also possible that this is some kind of bug in the PCI passthrough.  I 
didn't actually know that it worked for PCIe, but it's nice to know that it 
(sort of) does :-)

I apologise for suggesting testing on your own system; I imagine that doing 
this repeatedly is not doing your filesystem consistency any good :-(  It's 
possible that you'll get more suggestions than I've been able to provide from 
the xen-devel list.  Still, if you feel like doing some testing it may help.

It's also possible that there have been other reports like this, although I 
don't remember hearing of them.  Have you done a quick search of the mailing 
list archives and the bugzilla?  (or even just a google, in case someone 
grumbled about it on their blog).

The Asterisk-in-a-domU configuration seems to be rather popular, which is 
cool :-)


> 0b:08.0 Ethernet controller: Digium, Inc. Unknown device 8002 (rev 11)
>         Subsystem: Digium, Inc. Unknown device 8002
>         Control: I/O- Mem- BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr-
> Stepping- SERR- FastB2B-
>         Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
> <TAbort- <MAbort- >SERR- <PERR-
>         Interrupt: pin A routed to IRQ 16
>         Region 0: I/O ports at dc00 [disabled] [size=256]
>         Region 1: Memory at fc7dfc00 (32-bit, non-prefetchable) [disabled]
> [size=1K]
>         Expansion ROM at fc7e0000 [disabled] [size=128K]
>         Capabilities: [c0] Power Management version 2
>                 Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA
> PME(D0+,D1+,D2+,D3hot+,D3cold-)
>                 Status: D0 PME-Enable- DSel=0 DScale=0 PME-
> Any suggestions?  This is a new Dell PowerEdge 1950 with a PERC SATA RAID 1
> array, running CentOS 5.1 (2.6.18-53.1.14.el5xen) in both the dom0 and
> domU.

Push Me Pull You - Distributed SCM tool (http://www.cl.cam.ac.uk/~maw48/pmpu/)

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