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Re: [Xen-devel] [PATCH v2] docs/xl: Clarify documentation for mem-max and mem-set
- To: George Dunlap <george.dunlap@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- From: Juergen Gross <jgross@xxxxxxxx>
- Date: Mon, 8 Apr 2019 13:52:49 +0200
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- Cc: Lars Kurth <lars.kurth@xxxxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Wei Liu <wei.liu2@xxxxxxxxxx>, Konrad Wilk <konrad.wilk@xxxxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Tim Deegan <tim@xxxxxxx>, Julien Grall <julien.grall@xxxxxxx>, Jan Beulich <jbeulich@xxxxxxxx>, Ian Jackson <ian.jackson@xxxxxxxxxx>
- Delivery-date: Mon, 08 Apr 2019 11:53:03 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
- Openpgp: preference=signencrypt
On 08/04/2019 13:09, George Dunlap wrote:
> mem-set is the primary command that users will need to use and
> understand. Move it first, and clarify the wording; also specify that
> you can't set the target higher than maxmem from the domain config.
>
> mem-max is actually a pretty useless command at the moment. Clarify
> that users are not expected to use it; and document all of its quirky
> behavior.
>
> Signed-off-by: George Dunlap <george.dunlap@xxxxxxxxxx>
> ---
> v2:
> - Reword memory unit section based on review feedback
>
> I'm actully somewhat tempted to take out the entry for mem-max
> entirely -- it's not at all clear to me what anyone would use it for,
> and it's only likely to confuse people.
It is needed for being able to hotplug memory to a domain.
You'll need to:
- raise the limit of the domain via xl mem-max
- modify the static-max xenstore entry
- trigger hotplug in the domain (e.g. via ACPI in HVM)
Making the interface more usable is on my agenda for quite a while now,
but I have been too busy with other stuff lately.
Juergen
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