Re: [Xen-devel] [PATCH 1/8] netback: don't bind kthread to cpu

[Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>]

On Tue, Mar 05, 2013 at 01:30:10PM +0000, Wei Liu wrote:
> On Mon, 2013-03-04 at 20:51 +0000, Konrad Rzeszutek Wilk wrote:
> > On Fri, Feb 15, 2013 at 04:00:02PM +0000, Wei Liu wrote:
> > > The initialization process makes an assumption that the online cpus are
> > > numbered from 0 to xen_netbk_group_nr-1,  which is not always true.
> > 
> > And xen_netbk_group_nr is num_online_cpus()?
> > 
> 
> Yes.
> 
> > So under what conditions does this change? Is this when the CPU hotplug
> > is involved and the CPUs go offline? In which case should there be a
> 
> Yes, the hotplug path.
> 
> > CPU hotplug notifier to re-bind the workers are appropiate?

?
Can't that option be explored?
> > 
> > > 
> > > As we only need a pool of worker threads, simply don't bind them to 
> > > specific
> > > cpus.
> > 
> > OK. Is there another method of doing this? Are there patches to make the 
> > thread
> > try to be vCPU->guest affinite?
> > 
> 
> No, not at the moment.
> 
> 
> Wei.
> 
> 
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@xxxxxxxxxxxxx
> http://lists.xen.org/xen-devel
> 

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
http://lists.xen.org/xen-devel