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Re: [Xen-users] Xen 4.0.1 and megaraid_sas causes I/O to hang (xen-4 + m

On 14 Nov 2010, at 17:26, Stephan Austermühle <au@xxxxxxx> wrote:

> Hi Mark,
> Am 14.11.2010 18:06, schrieb Mark Adams:
>> Hi Stephen, are you doing any pci passthrough? I have the same issue, but 
>> with an Areca card, which seems to be caused by a possible irq conflict. 
>> I've not got to the bottom of it yet so not using the passthrough at the 
>> moment. The array doesn't go offline when passthrough is not in use.
> Yes and no. ;-)
> I was using PCI pass-through for an ISDN card but I stopped using it due
> to the system hangs (removed the 'pci' line from the domU config). At
> the moment no PCI pass-through is active and the RAID still goes offline
> from time to time.
> Stephan

Hi, I was doing a very similar thing, except just NICs being passed to use a 
red-fone box for voip... 

Have you disabled it completely from your dom0 kernel line also? (so it doesn't 
show anything anymore when you do xm pci-list-assignable-devices)

I haven't done this myself as I haven't seen a hang since I shut down the vm's 
that were using the passthrough, but I wonder if it might correct it.

I think something is seriously wrong in the passthrough with this kernel/xen 

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