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Re: [PATCH v14 08/11] qapi/s390/cpu topology: change-topology monitor co


From: Thomas Huth
Subject: Re: [PATCH v14 08/11] qapi/s390/cpu topology: change-topology monitor command
Date: Wed, 11 Jan 2023 11:09:56 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.13.0

On 05/01/2023 15.53, Pierre Morel wrote:
The modification of the CPU attributes are done through a monitor
commands.

s/commands/command/

It allows to move the core inside the topology tree to optimise
the cache usage in the case the host's hypervizor previously

s/hypervizor/hypervisor/

moved the CPU.

The same command allows to modifiy the CPU attributes modifiers

s/modifiy/modify/

like polarization entitlement and the dedicated attribute to notify
the guest if the host admin modified scheduling or dedication of a vCPU.

With this knowledge the guest has the possibility to optimize the
usage of the vCPUs.

Hmm, who is supposed to call this QMP command in the future? Will there be a new daemon monitoring the CPU changes in the host? Or will there be a libvirt addition for this? ... Seems like I still miss the big picture here...

 Thomas




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