Re: [Xen-devel] [PATCH] full support of setting scheduler parameters on domain creation

[George Dunlap <dunlapg@xxxxxxxxx>]

On Mon, May 21, 2012 at 2:34 PM, Ian Campbell <Ian.Campbell@xxxxxxxxxx> wrote:
>> Hmm. Scheduling parameters are handled in the hypervisor. I don't want to
>> export the knowledge about semantics to the tools. If this is no problem,
>> why can't I just set the defaults in the tools and omit asking the
>> hypervisor for the current settings?
>
> Exporting the idea that 0 is not a valid weight is (IMHO at least)
> better than exporting the fact that the default weight is (e.g.) 200 and
> hard coding that in multiple places.

I agree.

> You could define a symbolic name if that would make you more comfortable
> (that would allow us to change the specific value without changing the
> API)

That is, as long as the "reasonable value" is the same for all of the
parameters.

I half wonder if having an "init schedule params" function which would
set each value to the default for that value would be useful, or if it
would be overkill.

Of course, if we're doing that, it's only one step further to just
reading the actual scheduler parameters...

 -George

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