Re: Proposed new sysctl MIB nodes

Jason R Thorpe <thorpej-DZEk9q7Sfju/3pe1ocb+swC/[email protected]> writes:
> The GCC folks have recently started using the HW_PHYSMEM and HW_USERMEM
> sysctl MIB nodes to tune the behavior of the garbage collecting memory
> allocator in GCC.  It was pointed out there that these totally fall over
> with >=4G of RAM, since it's a 32-bit quantity that returns the number
> of bytes.
> 
> I'd like to propose new HW_PHYSPAGES and HW_USERPAGES MIB nodes that
> return the same information, but in a 32-bit page count, instead.  The
> implementation is left as an exercise to the reader.  I just want to get
> consensus on the names, so that I can tell the GCC people about it, and
> have it work on all the BSD platforms (as their current sysctl code does).

How about simply having a total memory count in quads instead? That
way we won't run out when we pass 2^48 or 49th bytes in 10 or 15
years.

Perry

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