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Re: [Xen-users] Re: [Xen-devel] pci-passthrough in pvops causing offline

To: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
Subject: Re: [Xen-users] Re: [Xen-devel] pci-passthrough in pvops causing offline raid
From: Mark Adams <mark@xxxxxxxxxxxxxxxxxx>
Date: Mon, 15 Nov 2010 17:11:45 +0000
Cc: "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, "xen-users@xxxxxxxxxxxxxxxxxxx" <xen-users@xxxxxxxxxxxxxxxxxxx>, "JBeulich@xxxxxxxxxx" <JBeulich@xxxxxxxxxx>
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On Sun, Nov 14, 2010 at 05:15:02PM +0000, Mark Adams wrote:
> On 12 Nov 2010, at 22:22, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx> 
> wrote:
> > On Fri, Nov 12, 2010 at 05:10:58PM +0000, Mark Adams wrote:
> >> On Thu, Nov 11, 2010 at 02:06:58PM -0500, Konrad Rzeszutek Wilk wrote:
> >>>> I've just noticed this at the end of xm dmesg
> >>>> 
> >>>> (XEN) msi.c:715: MSI is already in use on device 02:00.0
> >>>> (XEN) msi.c:715: MSI is already in use on device 02:00.0
> >>>> (XEN) msi.c:715: MSI is already in use on device 02:00.0
> >>>> 
> >>>> Something else trying to use the device being exported? (the nics are
> >>>> 02:00.0 and 03:00.0)
> >>> 
> >>> Hmm, looks like it, but it should not have happend. Can you attach
> >>> the output of 'xm dmesg' and also do the 'xm debug-keys ..' that I
> >>> asked for in the previous e-mail?
> >>> 
> >>> Jan, the fixes for the MSI you did, they weren't for 4.0.1 right? Just
> >>> for unstable?
> >>> 
> >> 
> >> Any further idea's on this? Is it a xen bug if the hidden device is being
> >> accessed in dom0? or is there an overlap somewhere? (not sure how this
> >> would work)..
> > 
> > I was going to look in the source today to get an idea but never got to 
> > it...
> > 
> > You might, as I mentioned in earlier emails, try to setup a serial console
> > or netconsole and log the Linux kernel output when it hangs/fails.
> > 
> can't do this unfortunately, the server
> Is in use so not able to just let it hang again... The passthrough is
> not in use now until I think there is some possible solution to get
> rid of the MSI conflict (when it won't hang anymore!)

Is there anything else I can do to help with resolution on this issue? I
see another user is also having a similar problem with (quiet possibly)
PCI passthrough causing their RAID array to go offline.

Did my logs show anything useful? You mentioned some fix for MSI earlier
has this been corrected in a newer version of Xen?


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