On Fri, 24 Sep 1999 [EMAIL PROTECTED] wrote:
>
> I never got an answer to my previous query. I wrote a test program which
> mallocs memory and does mlockall until mlockall fails at the arbitrary
> 50% of physical memory limit. I use memset to dirty up the memory and
> then go into a spin loop calling rand() to insure I stay in memory. The
> problem is mlockall claims that the memory is resident, locked, not
> pagable yet I can load more copies of the program than there is physical
> memory. Below is a snippet from top:
This has nothing to with RTLinux. From sys_mlock in linux/mm/memory.c:
/* we may lock at most half of physical memory... */
/* (this check is pretty bogus, but doesn't hurt) */
if (locked > num_physpages/2)
goto out;
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