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Re: [PATCH v8 4/7] xen/cpupool: Create different cpupools at boot time
- To: Luca Fancellu <Luca.Fancellu@xxxxxxx>
- From: George Dunlap <George.Dunlap@xxxxxxxxxx>
- Date: Mon, 9 May 2022 15:35:00 +0000
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- Cc: xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>, "bertrand.marquis@xxxxxxx" <bertrand.marquis@xxxxxxx>, "wei.chen@xxxxxxx" <wei.chen@xxxxxxx>, Andrew Cooper <Andrew.Cooper3@xxxxxxxxxx>, Jan Beulich <jbeulich@xxxxxxxx>, Julien Grall <julien@xxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>, Volodymyr Babchuk <Volodymyr_Babchuk@xxxxxxxx>, Dario Faggioli <dfaggioli@xxxxxxxx>, Juergen Gross <jgross@xxxxxxxx>
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- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
- Thread-index: AQHYYUDkkyUfpJQf80OfJO0ylO5+mq0WsiiA
- Thread-topic: [PATCH v8 4/7] xen/cpupool: Create different cpupools at boot time
> On May 6, 2022, at 1:00 PM, Luca Fancellu <Luca.Fancellu@xxxxxxx> wrote:
>
> Introduce a way to create different cpupools at boot time, this is
> particularly useful on ARM big.LITTLE system where there might be the
> need to have different cpupools for each type of core, but also
> systems using NUMA can have different cpu pools for each node.
>
> The feature on arm relies on a specification of the cpupools from the
> device tree to build pools and assign cpus to them.
>
> ACPI is not supported for this feature.
>
> With this patch, cpupool0 can now have less cpus than the number of
> online ones, so update the default case for opt_dom0_max_vcpus.
>
> Documentation is created to explain the feature.
>
> Signed-off-by: Luca Fancellu <luca.fancellu@xxxxxxx>
> Reviewed-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>
Changes to sched.h:
Acked-by: George Dunlap <george.dunlap@xxxxxxxxxx>
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