Re: [Qemu-devel] [RFC 3/3] memory/qmp: add set-memory-merge command

[Daniel P. Berrange]

On Mon, Jun 25, 2012 at 05:05:45PM -0500, Anthony Liguori wrote:
> On 06/25/2012 11:55 AM, Luiz Capitulino wrote:
> >Allow to enable/disable memory merging during run-time.
> >
> >This is implemented by extending the qemu_set_mem_merge() function.
> >
> >To test on HMP:
> >
> >   (qemu) set_memory_merge on
> >   (qemu) set_memory_merge off
> >
> >Signed-off-by: Luiz Capitulino<address@hidden>
> 
> Is there a requirement to tweak KSM dynamically on a per-VM basis or
> was this just a nice to have?
> 
> I can certainly understand wanting to run your VMs without KSM but
> not wanting to have to muck with global configuration values.
> 
> I would suspect that people would either overcommit or not
> overcommit as a global decision.  Once you overcommit even one
> machine, you potentially put your whole system in danger of swap.

I tend to agree, this monitor commands feels like a feature without a
clear usecase.

Daniel
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