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Re: [libvirt] Couple qemu driver bugs after xml refactoring



On Thu, Jul 24, 2008 at 09:39:36AM +0100, Daniel P. Berrange wrote:
> On Tue, Jul 22, 2008 at 05:23:00PM +0100, Daniel P. Berrange wrote:
> > On Tue, Jul 22, 2008 at 04:53:19PM +0100, Daniel P. Berrange wrote:
> > > There was a good reason for removing the 127.0.0.1 from the XML parsing
> > > stage, but i can't remember what it is :-) Anyway this should really be
> > > handled at the point where we build the command line in the qemu driver
> > > code
> > 
> > Oh I remember now - both Xen and QEMU have a global default setting
> > for VNC listen (/etc/libvirt/qemu.conf and /etc/xen/xend-config.sxp).
> > So, if we default to '127.0.0.1' in the parser, we'll always override
> > the global hypervisor default setting. Hence we need to apply any
> > defaults in the individual drivers at time of guest creation (if it
> > is applicable).
> 
> Here's a suggested patch for this:
> 
> diff -r 59140de4e7a9 src/qemu_driver.c
> --- a/src/qemu_driver.c	Mon Jul 21 18:27:29 2008 +0100
> +++ b/src/qemu_driver.c	Tue Jul 22 22:12:22 2008 +0100
> @@ -769,9 +769,14 @@
>          maxcpu = nodeinfo.cpus;
>  
>      CPU_ZERO(&mask);
> -    for (i = 0 ; i < maxcpu ; i++)
> -        if (vm->def->cpumask[i])
> +    if (vm->def->cpumask) {
> +        for (i = 0 ; i < maxcpu ; i++)
> +            if (vm->def->cpumask[i])
> +                CPU_SET(i, &mask);
> +    } else {
> +        for (i = 0 ; i < maxcpu ; i++)
>              CPU_SET(i, &mask);
> +    }
>  
>      for (i = 0 ; i < vm->nvcpupids ; i++) {
>          if (sched_setaffinity(vm->vcpupids[i],
> 
> 
> NB, I explicitly set the affinity if none is specified - this makes sure
> the children don't inherit any bogus affinity from the libvirtd daemon
> itself

  I don't see how this relates to VNC listening parameters, but this still
sounds a good idea :-)

  +1

Daniel

-- 
Red Hat Virtualization group http://redhat.com/virtualization/
Daniel Veillard      | virtualization library  http://libvirt.org/
veillard redhat com  | libxml GNOME XML XSLT toolkit  http://xmlsoft.org/
http://veillard.com/ | Rpmfind RPM search engine  http://rpmfind.net/


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