Re: weird calloc problem

Stephen C. Tweedie (sct@redhat.com)
Wed, 17 Mar 1999 15:47:40 GMT


Hi,

On Tue, 9 Mar 1999 19:51:32 -0600 (EST), marco saraniti
<saraniti@neumann.ece.iit.edu> said:

> I'm having a calloc problem that made me waste three weeks, at this point
> I'm out of options, and I was wondering if this can be a kernel- or
> MM-related problem. Furthermore, the system is a relatively big machine and
> I'd like to share my experience with other people who are interested in
> using Linux for number crunching.

> The problem is trivial: calloc returns a NULL, even if there is a lot
> of free memory. Yes, both arguments of calloc are always > 0.

Do you have any evidence that this is a kernel problem as opposed to a
user-space problem? A "ps -m" listing of the process concerned when
the fault happens would be useful in pinning this down, as would a
"strace" output.

--Stephen

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