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

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 10.11.14 at 09:03, <sflist@xxxxxxxxx> wrote:
> Sorry for the delay, took some debugging on another computer to get 
> serial logging working. Due to its size, I've posted the entire log of a 
> crashed session here: http://pastebin.com/AiPHUZRH In this case I used a 
> 3.0 gig memory size for the Windows domU.
> 
> As I mentioned before, sometimes it's the SATA that goes first, other 
> times the tg3 ethernet driver. Also note that between 4.4.1 and 4.5rc1, 
> the kernel I'm using (stock Debian Jessie) has not changed.
> 
> Please let me know if you need any other information. Thanks!

Raising the kernel log level to maximum too would have helped.

Regardless of that, the first device showing anomalies here appears
to be the UHCI controller:

    [  147.415713] usb 7-1: reset low-speed USB device number 2 using uhci_hcd

while booting the guest.

And these

    [  199.775209] pcieport 0000:00:03.0: AER: Multiple Corrected error 
received: id=0018
    [  199.775238] pcieport 0000:00:03.0: PCIe Bus Error: severity=Corrected, 
type=Data Link Layer, id=0018(Transmitter ID)
    [  199.775251] pcieport 0000:00:03.0:   device [8086:340a] error 
status/mask=00001100/00002000
    [  199.775255] pcieport 0000:00:03.0:    [ 8] RELAY_NUM Rollover    
    [  199.775258] pcieport 0000:00:03.0:    [12] Replay Timer Timeout  

hint at a problem in the system's design. 00:03.0 is the parent bridge
of 02:00.0 (and from what I can tell that's the only device behind that
bridge), and hence the above messages can only reasonably have
their origin at the passed through VGA device. IOW it may well be that
you were just lucky that things worked earlier on.

And btw - the title saying "host crash" seems to not match the provided
log, as there's no sign of a crash anywhere (the host may be hung from
what is visible). Was that just badly worded, or have you actually seen
crashes too?

Jan


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