Re: [Xen-devel] Xen 4 serial hangs during boot

["Christopher S. Aker" <caker@xxxxxxxxxxxx>]

On 10/13/11 6:46 AM, Tim Deegan wrote:
> At 15:34 -0400 on 12 Oct (1318433686), Christopher S. Aker wrote:
> > Since I started playing with Xen 4 (vs 3.x), machines often hang during
> > reboot at exactly the same place:
We're still seeing this occasionally, even with 'cpuinfo' added to Xen 
args.  Serial console stops responding during Xen booting - every time 
in the exact same place:
        (XEN) CPU9: Intel(R) Xeon(R) CPU L5520 @ 2.27GHz stepping 05
        (XEN) CPU 10

The machine continues to boot and becomes available via network, however 
nothing I do from then on can get serial to start working again. 
Control-AAA, sending massive amounts to /dev/console, etc.  If I issue 
the reboot command via dom0 something will tickle Xen and a page or two 
of buffered OLD data will flush out the serial before the machine 
reboots, which is interesting.
In this state hvc_console receives no interrupts.  When not in this 
state hvc_console seems to get interrupts occasionally.  Not sure of its 
significance.
I still have a box in this state if anyone has ideas to try.

-Chris

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