Messages in this thread | | | Date | Thu, 27 Mar 2003 23:57:30 -0800 | From | William Lee Irwin III <> | Subject | Re: 64GB NUMA-Q after pgcl |
| |
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 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |