FYI in Tyan S4881 (8 ways dual core 875 cpu ) with LinuxBIOS I got also the 1G mem hole is enabled.
So the kernel should be OK with read NUMA directly from HW. YH Firmware type: LinuxBIOS old bootloader convention, maybe loadlin? Bootdata ok (command line is apic=debug ramdisk_size=65536 root=/dev/ram0 rw console=tty0 console=ttyS0,115200n8 ) Linux version 2.6.12 ([EMAIL PROTECTED]) (gcc version 3.3.3 (SuSE Linux)) #8 SMP Fri Jun 24 12:41:43 PDT 2005 BIOS-provided physical RAM map: BIOS-e820: 0000000000000000 - 0000000000000e48 (reserved) BIOS-e820: 0000000000000e48 - 00000000000a0000 (usable) BIOS-e820: 00000000000f0000 - 00000000000f0400 (reserved) BIOS-e820: 0000000000100000 - 00000000c0000000 (usable) BIOS-e820: 0000000100000000 - 0000000840000000 (usable) Scanning NUMA topology in Northbridge 24 Number of nodes 8 Node 0 MemBase 0000000000000000 Limit 000000013fffffff Node 1 MemBase 0000000140000000 Limit 000000023fffffff Node 2 MemBase 0000000240000000 Limit 000000033fffffff Node 3 MemBase 0000000340000000 Limit 000000043fffffff Node 4 MemBase 0000000440000000 Limit 000000053fffffff Node 5 MemBase 0000000540000000 Limit 000000063fffffff Node 6 MemBase 0000000640000000 Limit 000000073fffffff Node 7 MemBase 0000000740000000 Limit 000000083fffffff node 1 shift 24 addr 140000000 conflict 0 node 1 shift 25 addr 1fe000000 conflict 0 node 3 shift 26 addr 3fc000000 conflict 0 node 7 shift 27 addr 7f8000000 conflict 0 Using node hash shift of 28 Bootmem setup node 0 0000000000000000-000000013fffffff Bootmem setup node 1 0000000140000000-000000023fffffff Bootmem setup node 2 0000000240000000-000000033fffffff Bootmem setup node 3 0000000340000000-000000043fffffff Bootmem setup node 4 0000000440000000-000000053fffffff Bootmem setup node 5 0000000540000000-000000063fffffff Bootmem setup node 6 0000000640000000-000000073fffffff Bootmem setup node 7 0000000740000000-000000083fffffff in LB Setting variable MTRR 0, base: 0MB, range: 32768MB, type WB Setting variable MTRR 1, base: 32768MB, range: 1024MB, type WB Setting variable MTRR 2, base: 3072MB, range: 1024MB, type UC On 7/14/05, Andi Kleen <[EMAIL PROTECTED]> wrote: > > AFIAK, for x86_64 kernel, it will try to read NUMA configuration from > > HW directory. We don't have to export any ACPI table. > > It doesn't work for dual core or 8 sockets for some reason. Since the SRAT > code works fine and is in general more future proof we never tracked down > why. Patches welcome. > > However you'll likely need ACPI for other reasons anyways, e.g. for > better power saving. > > -Andi > > - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
