Re: [Xen-devel] Xen-Unstable : strange power cycling problem

["sh1978a@xxxxxxxxx" <sh1978a@xxxxxxxxx>]

I will try to get a serial console setup on Monday to collect crash dump. Will it dump it by default on serial console before rebooting though?

 

No SMP, it's a single processor machine. BTW, I had mentioned watchdog in grub boot line, when it happened (though i am not sure where watchdog is supposed to log?)

 

No, it's not a generic networking problem.. it comes only when I try to connect to dom0 from dom1. Other cases like, connecting to another machine from dom1, and conencting to dom1 from other machine works fine.  I will try connecting to dom1 from dom0 and see what happens.

 

Do you guys get similar problem on your systems, or is it just me..

 

sachin

Ian Pratt <Ian.Pratt@xxxxxxxxxxxx> wrote:

> This is obviously very concerning. Would it be possible for you
> to connect a serial console to collect a crash dump? You'll need
> to put "com1=115200,8n1" on the xen grub line.
>
> Because dom0 owns the VGA console, Xen isn't easily able to do a
> crash dump to it. Hmm, maybe Xen should try snatching it back in
> the event of a crash, but this wouldn't work if the display was
> running X anyhow.
>
> Is your machine multiprocessor? If so, can you reproduce with
> "nosmp" on the Xen command line?
>
> It seems rather more likely that you're experiencing a general
> networking problem rather than something specific to incoming
> connections. Please can you test this by trying to exercise
> networking e.g. using ttcp. 
>
> Although it won't help with this particular problem, its always
> worth running with "watchdog" enabled. [There's a strong argument
> for
>  making this the default.]
>
> Ian

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