Re: 64GB NUMA-Q after pgcl

William Lee Irwin III
2003-03-28T07:46:41Z

On Fri, Mar 28, 2003 at 02:45:30AM -0500, Zwane Mwaikambo wrote:
> before:
> Memory: 65306956k/67100672k available (1724k kernel code, 98252k reserved, 781k data, 284k init, 65134592k highmem)
> after:
> Memory: 65946144k/67100672k available (1956k kernel code, 15936k reserved, 667k data, 300k init, 65198080k highmem)
> Would you mind explaining the details as to what would cause that
> discrepancy in reserved memory size?

Sure. On NUMA-Q mem_map[] is not allocated using bootmem except for
node 0. Various other bootmem allocations are also proportional to
memory as measured in units of PAGE_SIZE, but not all.

So all we're seeing here is node 0's mem_map[] with "miscellaneous"
bootmem allocations thrown in, whether reduced or increased.

This is not very reflective of what's going on as the majority of mem_map[]
is allocated through a custom reservation mechanism as opposed to bootmem.

-- wli