Re: [Xen-ia64-devel] A strange issue when VTI guest vcpus number is near pcpus

[Isaku Yamahata <yamahata@xxxxxxxxxxxxx>]

On Wed, May 06, 2009 at 01:54:15PM +0800, You, Yongkang wrote:
> On  xen-ia64-devel-bounces@xxxxxxxxxxxxxxxxxxx wrote:
> > Hi,
> > 
> > When I try recently Xen (Xen 3.4 rc3) on IA64 machine
> > (Tiger4), I found some strange issue.
> > 
> > My two systems have 4 and 8 pcpus separately
> > 
> > If VTI guest's vcpus is near pcpus, guest booting will meet
> > some issues:
> > 1. Guest boot might be hang at "switch to new root and run
> > init; unmounting old /dev ...; unmounting old /sys" for a long time.

Does this mean that it's unreasonably slow?
And it reached login prompt eventually?
Although I haven't tested it yet.


> > 2. After guest boot up, it might report "illegal instructions"
> > for command or report "readonly filesystem".
> > 
> > I didn't catch it in UP or 2 vcpus conditions.
> > 
> > Looks a qemu issue? Did you meet it also?
> > 
> 
> If I double vcpus ( 2*pcups), this issue is more easy to happen. I didn't try 
> multi guest yet. 
> 
> Thanks,
> Yongkang

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-- 
yamahata

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