Memory lock problem in Linux

Michael Champigny (champign@cadtls.hlo.dec.com)
Wed, 15 Oct 1997 17:53:21 -0400 (EDT)

It looks like the mlockall call in Linux is broken, at least in the stock
2.0.30 production kernel. Try running this as root:

#define _XOPEN_SOURCE
#include <unistd.h>
#include <stdio.h>
#include <sys/mman.h>

int main(void)
{
mlockall(MCL_CURRENT);
printf("Do something...\n");
exit(0);
}

You should get a seg fault. I've only tested this on Alpha, but I'm
sure it's there for all architectures. Can someone fix this? It's
keeping me from developing real-time apps in Linux. Richard Henderson,
and others have a patch for this, (which works) but it's not in the
production source tree yet. :-( Can someone create (or get) the patch
and submit it to Linus?

-- 
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|   Michael Champigny - Software Engineer  |   |   |   |   |   |   |   |
|        Alpha CAD Physical Analysis       | d | i | g | i | t | a | l |
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