Re: A few netbsd/xen questions

[Hugo Silva <hugo%barafranca.com@localhost>]

Manuel Bouyer wrote:
> On Fri, Sep 25, 2009 at 11:15:49AM +0100, Hugo Silva wrote:
>   
> > Good morning,
> >
> > A few doubts have collected in my mind after some time playing with a  
> > NetBSD 5 xen dom0:
> >
> >
> > a)
> > options        SYSCALL_STATS   # per syscall counts
> > options        SYSCALL_TIMES   # per syscall times
> >
> > in a Xen kernel doesn't seem to work ("can't get syscall counts: No such  
> > file or directory"). Just to be sure I didn't forget anything, I booted  
> > another netbsd machine and compiled GENERIC with these two options, and  
> > surely enough I could get the syscall counts from 'systat syscall'.
> >     
>
> AFAIK this is completely MI, I can't see why this would not work in a Xen
> guest.
>
>   

Nevermind about this one, it works. My bad.

> > Related to this, is there any noticeable overhead caused by having these  
> > enabled?
> >
> >
> > b)
> > In 'xm top', NETTX and NETRX were not updating as my domU was blasting  
> > 7MB/s over HTTP. Could this be because my domU is HVM?
> >     
>
> This is not implemented for NetBSD dom0s
>
>   
> > c)
> > Has anyone tried http://wiki.xensource.com/xenwiki/XenWindowsGplPv with  
> > a NetBSD dom0?
> >     
>
> Last time I tried, all I could get was a blue screen.
> I'll try again.
>   

Keep us posted, please :)

>   
> > d)
> > For the developers: What's the status of SMP support for NetBSD/Xen  
> > (nbsd dom0 smp and nbsd PV domU smp)? Would funding help the work  
> > progress?
> >     
>
> Provided there's someone willing to do the work
>
>   
> > Is there interest in actually having SMP support for netbsd  
> > xen dom0/domU, in your personal opinion?
> >     
>
> there is.
>
>   
> > If yes, what's preventing this from happening? (technical, human  
> > resources, work is actually ongoing, etc)
> >     
>
> human resources.
>
>   
> > e)
> > For the developers: Any updates on  
> > http://mail-index.netbsd.org/port-xen/2009/08/20/msg005280.html ?
> >     
>
> AFAIK no.
>
>   

Human resources, too ? There was already a discussion about the possible 
future implications of this, would you like to add anything else?



One more question: Is anyone running domUs with iSCSI ? A few months ago 
I did some tests with a 8-CURRENT freebsd box exporting ZFS volumes and 
using these to host domUs on netbsd, it seemed to work well, however 
that was a homebrew experiment with a laptop-dom0 :-) I'm interested in 
hearing success stories, if anyone has any to share.

p.s. Thanks for the quick response, Manuel.