Re: [Xen-devel] [PATCH for 4.5 v4 1/4] xen: add real time scheduler rtds

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 24.09.14 at 15:14, <dario.faggioli@xxxxxxxxxx> wrote:
> On mer, 2014-09-24 at 13:09 +0100, Jan Beulich wrote:
>> Furthermore the function appears to lack serialization with other
>> scheduler operations.
>> 
> Not sure what you mean here. There's only one lock serializing
> everything in this scheduler, and it's already taken when this is
> called, the only exception being when it's called from rt_alloc_vdata().
> 
> Is it that one you're referring to?

No. The call path do_domctl() -> sched_adjust() -> rt_dom_cntl()
doesn't take any scheduler related locks afaics.

Jan


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