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SubjectRe: Overcommitable memory??
On Fri, 17 Mar 2000, Stephen C. Tweedie wrote:
> On Tue, 14 Mar 2000 14:32:49 -0300 (BRST), Rik van Riel
> <riel@conectiva.com.br> said:
>
> >> Without overcommit that just can not happen. There will be
> >> either a free page of memory or a free page of swap into which
> >> you can swap something else out.
>
> > Without overcommit it can still happen, unless you reserve one
> > page of swap space for every page of data that gets mmap()ed...
>
> Even that doesn't cure things. Think about stack growth.

Exactly.

I'd really like the non-overcommit fans to come up
with a good reason why a non-overcommitting system
doesn't suffer from the same problem, but all I've
seen so far are changes to the problem :)

(and no, I don't believe there is any solution to
OOM on any system that allows userspace to dynamically
allocate memory ....)

cheers,

Rik
--
The Internet is not a network of computers. It is a network
of people. That is its real strength.

http://www.conectiva.com/ http://www.surriel.com/


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