Re: [Xen-devel] Regression, host crash with 4.5rc1

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Mon, Nov 03, 2014 at 01:46:03PM -0800, Steve Freitas wrote:
> Hi all,
> 

Hello,

> I've got a Windows 7 x64 VM that is stable on 4.4.1 but crashes the
> host after a few hours on 4.5rc1. The machine is a ThinkStation D20,
> an X5660 with 5500-series chipset with an Nvidia Quadro FX4800
> (genuine) passed through. Distro is Debian Jessie running stock
> distro kernel and seabios. Both 4.4.1 and 4.5rc1 were built from
> source. Apologies if this issue has already been spotted but I can't
> keep up with the traffic on this list! :-)
> 
> It looks as if something is stepping on PCI devices when the crash
> happens. In the log included below, it's the SATA system that's
> complaining but I've seen it hit the ethernet chip first, then SATA
> after that. I'm happy to troubleshoot, apply patches, give more
> information, etc.
> 
> I've seen the crash when running Windows Update, when running the
> Unigine graphics benchmark, when running an Avast anti-virus scan.
> Haven't found a common thread.
> 
> Don, one curious thing I noted which may be of no value whatsoever:
> Under 4.4.1, I can't give the VM > 3.5 gigs of RAM without breaking
> VGA passthrough. Under 4.5rc1 I can give the VM more than 3.5 gigs,
> yet I *don't* need to use the "mmio_hole" settings in the VM config.
> Not sure why or what that might signify, if anything.
> 

Does it run stable with Xen 4.5 without PCI/GPU passthru? 


> Possibly useful information follows.
> 
> Thanks,
> 
> Steve
> 
> 
> (I was monitoring syslog over a network connection since nothing of
> value can be saved to disk under the circumstances.)
> 

It'd be very helpful if you could set up a serial console to log all the Xen 
and dom0 Linux kernel messages,
so we could see where it actually crashes..


-- Pasi


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