Re: [Xen-devel] [PATCH RFC v2] Add SUPPORT.md

[Stefano Stabellini <sstabellini@xxxxxxxxxx>]

On Mon, 11 Sep 2017, George Dunlap wrote:
> +### RTDS based Scheduler
> +
> +    Status: Experimental
> +
> +A soft real-time CPU scheduler built to provide guaranteed CPU capacity to 
> guest VMs on SMP hosts
> +
> +### ARINC653 Scheduler
> +
> +    Status: Supported, Not security supported
> +
> +A periodically repeating fixed timeslice scheduler. Multicore support is not 
> yet implemented.
> +
> +### Null Scheduler
> +
> +    Status: Experimental
> +
> +A very simple, very static scheduling policy 
> +that always schedules the same vCPU(s) on the same pCPU(s). 
> +It is designed for maximum determinism and minimum overhead
> +on embedded platforms.

Hi all,

I have just noticed that none of the non-credit schedulers are security
supported. Would it make sense to try to support at least one of them?

For example, RTDS is not new and Dario is co-maintaining it. It is
currently marked as Supported in the MAINTAINERS file. Is it really fair
to mark it as "Experimental" in SUPPORT.md?

The Null scheduler was new when we started this discussion, but now that
Xen 4.10 is entering code freeze, Null scheduler is not so new anymore.
We didn't get any bug reports during the 4.10 development window. By the
time this document is accepted and Xen 4.10 is out, Null could be a
candidate for "Supported" too.

Thoughts?

Cheers,

Stefano

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