Re: [Xen-devel] [RFH] xen domain0 failover stuff

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

On 27 Mar 2006, at 23:08, Don Zickus wrote:

> I am ignorantly trying to find a way to start a second domain0 when the
> first domain0 crashes.  My original intent was to find a way to 
> collect a
> core file much in the same way the domainU core files are collected on 
> a
> linux box.
>
> I managed to hack in some hooks to get a second domain0 loaded and 
> started
> upon a crash.  However, I am stuck without console output, ie printk() 
> is
> not working.  Oddly, early_printk() works fine and I can sort of track 
> the
> progress of the second domain0 as it boots.  So my first question is 
> how
> does the serial console (not vga) magic work for a domain0 kernel?  Do 
> I
> have to set some internal domain bits to have the console output
> redirected to the serial port as opposed to userspace and xend (ala
> domainU kernels)?
The new domain0 must have SIF_INITDOMAIN flag set in its start_info 
flags.
 -- Keir


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