[Swan-dev] KVM memory size

[Andrew Cagney]

On Fri, 28 Jun 2019 at 03:31, Tuomo Soini <tis at foobar.fi> wrote:
>
> On Thu, 27 Jun 2019 17:14:14 -0400
> Andrew Cagney <andrew.cagney at gmail.com> wrote:
>
> > On Thu, 27 Jun 2019 at 15:24, Paul Wouters <paul at nohats.ca> wrote:
> > >
> > > I build rpms on east or west usually. I guess I could use the
> > > “build” machine but that sounds more complicated if I need to do
> > > them a lot to test something.
> >
> > OTOH, the memory requirements for normal testing just doubled :-(
>
> That is not true. Virtualization does memory ballooning - so you could
> give 2G to each vm without exchausting memory in the host system - only
> used memory is really used. That's why I tried to explain you long time
> ago when you decreased vm ram.

We're both right.  Linux kernels are very good at hoovering up all
available ram.