Re: [Xen-devel] [PATCH 1 of 3] Support of getting scheduler defaults

[Juergen Gross <juergen.gross@xxxxxxxxxxxxxx>]

On 05/23/2012 09:22 AM, Dario Faggioli wrote:
> On Wed, 2012-05-23 at 07:34 +0200, Juergen Gross wrote:
> > > #define PERIOD_MAX MILLISECS(10000) /* 10s  */
> > > #define PERIOD_MIN (MICROSECS(10))  /* 10us */
> > > #define SLICE_MIN (MICROSECS(5))    /*  5us */
> > I think this should remain in the hypervisor only.
> Me too.
>
> > > Also, extratime is a flag, so I think 0 and 1 are both meaningful
> > > values, maybe we can go for -1 as for cap (I'll try and let you know).
> > Why not -1 for all values?
> Would work, I guess, unless there's some collision with big weights
> represented on short unsigned value (not sure it's like that, and I've
> always been bad at this kind of math! :-P).
The -1 would be set in scparams only, and there it is an integer. It should
never be written to the "real" scheduler parameters passed to the hypervisor.


Juergen

--
Juergen Gross                 Principal Developer Operating Systems
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