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Re: [Qemu-devel] [PATCH v2 2/2] docs: Document vCPU hotplug procedure
From: |
Igor Mammedov |
Subject: |
Re: [Qemu-devel] [PATCH v2 2/2] docs: Document vCPU hotplug procedure |
Date: |
Mon, 1 Oct 2018 10:59:04 +0200 |
On Mon, 1 Oct 2018 10:18:45 +0200
Kashyap Chamarthy <address@hidden> wrote:
> On Thu, Sep 27, 2018 at 04:33:16PM +0200, Markus Armbruster wrote:
> > Igor Mammedov <address@hidden> writes:
> >
> > > On Tue, 25 Sep 2018 18:02:48 +0200
> > > Kashyap Chamarthy <address@hidden> wrote:
>
> [...]
>
> > >> +(3) Check which socket is free to allow hotplugging a CPU::
> > > may be: which cpus are possible to plug (an entry with qom-path
> > > property describes an existing cpu)
> >
> > Suggest
> >
> > (3) Find out which CPU types could be plugged, and into which sockets:
>
> Yeah, clearer.
>
> [...]
>
> > >> +(4) We can see that socket 1 is free,
> >
> > How? I know, but only because I just read the documentation of
> > query-hotpluggable-cpus. Which by the way sucks. For instance, will
> > the command always return exactly one HotpluggableCPU object per socket?
>
> About the 'how', I was not entirely sure, hence my request in the cover
> letter.
>
> > Anyway, what about this:
> >
> > The command returns an object with a "qom-path" member for each
> > present CPU. In this case, it shows an IvyBridge-IBRS-x86_64-cpu in
> > socket 0.
> >
> > It returns an object without a "qom-path" for every possibly CPU
> > hot-plug. In this case, it shows you can plug an
> > IvyBridge-IBRS-x86_64-cpu into socket 1, and the additional
> > properties you need to pass to device_add for that.
not really sure my English (CCed Eric) but to match 'an object' with
the rest of sentence:
It returns an object without a "qom-path" for a possible to hot-plug CPU.
+
In this case, it shows you can plug an IvyBridge-IBRS-x86_64-cpu
into socket 1/core = 0/thread 0, where 'props' list describes
additional properties you need to pass to device_add for hot-pluging
that CPU.
>
> Crystal clear.
>
> Many thanks for the review!
>
> > > ... and 'arguments' provide a list of property/value pairs to create
> > > corresponding cpu.
> > >
> > >> + "IvyBridge-IBRS-x86_64-cpu"::
> >
> > Suggest
> >
> > (4) Hot-plug an additional CPU:
>
> [...]
>