Re: [PATCH] Prevent OOM from killing init

[george anzinger <george@mvista.com>]

What happens if you just make swap VERY large?  Does the system thrash
it self to a virtual standstill?  Is this a possible answer?  Supposedly
you could then sneak in and blow away the bad guys manually ...

George

Paul Jakma wrote:
> 
> On Fri, 23 Mar 2001, Szabolcs Szakacsits wrote:
> 
> > About the "use resource limits!". Yes, this is one solution. The
> > *expensive* solution (admin time, worse resource utilization, etc).
> 
> traditional user limits have worse resource utilisation? think what
> kind of utilisation a guaranteed allocation system would have. instead
> of 128MB, you'd need maybe a GB of RAM and many many GB of swap for
> most systems.
> 
> some hopefully non-ranting points:
> 
> - setting up limits on a RH system takes 1 minute by editing
> /etc/security/limits.conf.
> 
> - Rik's current oom killer may not do a good job now, but it's
> impossible for it to do a /perfect/ job without implementing
> kernel/esp.c.
> 
> - with limits set you will have:
>  - /possible/ underutilisation on some workloads.
>  - chance of hitting Rik's OOM killer reduced to almost nothing.
> 
> no matter how good or bad Rik's killer is, i'd much rather set limits
> and just about /never/ have it invoked.
> 
> more beancounting will make limits more useful (eg global?) and maybe
> dists can start setting up some kind of limits by default at install
> time based on the RAM installed and whether user selected
> server/workstation/etc.. install.
> 
> Then hopefully we can be a little less concerned about how close Rik
> gets to the impossible task of implementing esp.c.
> 
> >         Szaka
> 
> --paulj
> 
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