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Re: [Qemu-ppc] [Qemu-devel] [libvirt] [PATCH 1/2] numa: deprecate 'mem'

From: Michal Privoznik
Subject: Re: [Qemu-ppc] [Qemu-devel] [libvirt] [PATCH 1/2] numa: deprecate 'mem' parameter of '-numa node' option
Date: Mon, 4 Mar 2019 17:12:40 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.5.2

On 3/4/19 4:19 PM, Igor Mammedov wrote:

Then I'd guess that most VMs end up with default '-numa node,mem'
which by design can produce only fake NUMA without ability to manage
guest RAM on host side. So such VMs aren't getting performance benefits
or worse run with performance regression (due to wrong sched/mm decisions
as guest kernel assumes NUMA topology is valid one).

Specifying NUMA distances in libvirt XML makes it generate the modern cmd line.


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