Re: Resource limits

Neil Horman
2005-09-26T15:57:03Z

On Mon, Sep 26, 2005 at 05:18:17PM +0300, Al Boldi wrote:
> Rik van Riel wrote:
> > On Sun, 25 Sep 2005, Al Boldi wrote:
> > > Resource limits in Linux, when available, are currently very limited.
> > >
> > > i.e.:
> > > Too many process forks and your system may crash.
> > > This can be capped with threads-max, but may lead you into a lock-out.
> > >
> > > What is needed is a soft, hard, and a special emergency limit that would
> > > allow you to use the resource for a limited time to circumvent a
> > > lock-out.
> > >
> > > Would this be difficult to implement?
> >
> > How would you reclaim the resource after that limited time is
> > over ? Kill processes?
>
> That's one way, but really, the issue needs some deep thought.
> Leaving Linux exposed to a lock-out is rather frightening.
>
What exactly is it that you're worried about here? Do you have a particular
concern that a process won't be able to fork or create a thread? Resources that
can be allocated to user space processes always run the risk that their
allocation will not succede. Its up to the application to deal with that.

> Neil Horman wrote:
> > Whats insufficient about the per-user limits that can be imposed by the
> > ulimit syscall?
>
> Are they system wide or per-user?
>
ulimits are per-user.
Neil

> --
> Al
>
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*Neil Horman
*Software Engineer
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