Re: [Xen-devel] [PATCH v3 2/5] build: Hook the schedulers into Kconfig

[Dario Faggioli <dario.faggioli@xxxxxxxxxx>]

On Fri, 2016-01-08 at 15:54 +0000, Andrew Cooper wrote:
> On 08/01/16 15:47, Konrad Rzeszutek Wilk wrote:
> >Â
> > And the hypervisor did build with:
> > 
> > [konrad@char xen]$ nm --defined xen-syms |grep schedulers
> > ffff82d080290d58 D __end_schedulers_array
> > ffff82d080290d58 D __start_schedulers_array
> > 
> > :-)
> > 
> > Not exactly sure if there is some way to make us _not_ shoot
> > ourselves in the foot by mistake.
> > 
> > Perhaps the build should complain if the size of the
> > __schedulers_array is zero?
> 
> Hmm yes - an ASSERT() at the bottom of the linker file would be a
> very
> good defensive measure.
> 
+1

> A hypervisor without any schedulers compiled in will be rather sad.
> 
Well, it depends on how many pCPUs the host you want to run the
hypervisor on has: if it has 0 of them, no scheduler at all is the
perfect solution... not to mention that the combination of these things
(0 CPUs and no scheduling), would make a lot of issues just instantly
disappear! :-D

Regards,
Dario
--Â
<<This happens because I choose it to happen!>> (Raistlin Majere)
-----------------------------------------------------------------
Dario Faggioli, Ph.D, http://about.me/dario.faggioli
Senior Software Engineer, Citrix Systems R&D Ltd., Cambridge (UK)

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