On Sun, Aug 11, 2019 at 10:36 AM <mcatanz...@gnome.org> wrote:
>
> On Sun, Aug 11, 2019 at 10:50 AM, Chris Murphy
> <li...@colorremedies.com> wrote:
> > Let's take another argument. If the user manually specifies 'ninja -j
> > 64' on this same system, is that sabotage? I'd say it is. And
> > therefore why isn't it sabotage that the ninja default computes N jobs
> > as nrcpus + 2?  And also doesn't take available memory into account
> > when deciding what resources to demand? I can build linux all day long
> > on this system with its defaults and never run into a concurrent
> > usability problem.
> >
> > There does seem to be a dual responsibility, somehow, between the
> > operating system and the application, to make sure sane requests are
> > made and honored.
>
> This seems like a distraction from the real goal here, which is to
> ensure Fedora remains responsive under heavy memory pressure, and to
> ensure unprivileged processes cannot take down the system by allocating
> large amounts of memory. Fixing ninja and make to dynamically scale the
> number of parallel build processes based on memory pressure would be
> wonderful, but it's not going to solve the underlying issue here, which
> is that random user processes should never be able to hang the system.

That's fair.

-- 
Chris Murphy
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