Re: [Xen-devel] [PATCH v2 1/2] arinc: Add cpu-pool support to scheduler.

[Dario Faggioli <dario.faggioli@xxxxxxxxxx>]

On mar, 2013-12-03 at 17:24 -0500, Nathan Studer wrote:
> From: Nathan Studer <nate.studer@xxxxxxxxxxxxxxx>
> 
> 1.  Remove the restriction that dom0 must be in the schedule, since dom-0 may
> not belong to the scheduler's pool.
> 2.  Add a schedule entry for each of dom-0's vcpus as they are created.
> 3.  Add code to deal with empty schedules in the do_schedule function.
> 4.  Call the correct idle task for the pcpu on which the scheduling decision
> is being made in do_schedule.
> 5.  Add code to prevent migration of a vcpu.
> 6.  Implement a proper cpu_pick function, which prefers the current processor.
> 7.  Add a scheduler lock to protect access to global variables from multiple
>     PCPUs.
> 
> These changes do not implement arinc653 multicore.  Since the schedule only
> supports 1 vcpu entry per slot, even if the vcpus of a domain are run on
> multiple pcpus, the scheduler will essentially serialize their execution.
> 
> Signed-off-by: Nathan Studer <nate.studer@xxxxxxxxxxxxxxx>

I'm not yet familiar enough with the details of the algorithm itself
yet, but still, FWIW:

Reviewed-by: Dario Faggioli <dario.faggioli@xxxxxxxxxx>

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

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