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Re: [PATCH 4/5] xen/cpupool: Create different cpupools at boot time
- To: Juergen Gross <jgross@xxxxxxxx>
- From: Luca Fancellu <luca.fancellu@xxxxxxx>
- Date: Tue, 15 Feb 2022 17:56:48 +0000
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- Cc: Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>, Wei Chen <wei.chen@xxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, Volodymyr Babchuk <Volodymyr_Babchuk@xxxxxxxx>, Bertrand Marquis <bertrand.marquis@xxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, George Dunlap <george.dunlap@xxxxxxxxxx>, Jan Beulich <jbeulich@xxxxxxxx>, Wei Liu <wl@xxxxxxx>, Dario Faggioli <dfaggioli@xxxxxxxx>
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> On 15 Feb 2022, at 10:48, Juergen Gross <jgross@xxxxxxxx> wrote:
>
> On 15.02.22 11:15, Luca Fancellu wrote:
>> Introduce an architecture specific 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.
>> Documentation is created to explain the feature.
>> Signed-off-by: Luca Fancellu <luca.fancellu@xxxxxxx>
>
> IIRC I suggested to have the core functionality in common code in order
> to allow using boot time cpupool creation e.g. via commandline for x86,
> too.
Yes, however I think the parser to handle everything by command line would
be huge due to input sanitisation and not easy enough as the DT, however
I see Hyperlaunch has plans to use DT on x86 so I guess it would be ok to make
this feature common once the DT is available also on x86.
Cheers,
Luca
>
>
> Juergen
> <OpenPGP_0xB0DE9DD628BF132F.asc>
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