From mboxrd@z Thu Jan 1 00:00:00 1970 From: Erich Focht Date: Thu, 08 Aug 2002 16:40:24 +0000 Subject: [Linux-ia64] discontig-ia64 and acpi-numa patches Message-Id: List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-ia64@vger.kernel.org Hi! This is a second attempt to split the discontig-ia64 patch. The result is on sourceforge at: http://sf.net/project/showfiles.php?group_id=35660&release_id=103977 There are three patches for 2.4.18 + ia64-020722 : The main change: the previous core part was splitted, the ACPI initialization was changed into arch-dependent and -independent parts. 01_discontig-acpi-numa.diff : required, provides ACPI initialization of NUMA specific variables. 02_discontig-core.diff : core part providing discontigmem functionality. 03_discontig-krel-krep.diff : optional part of discontigmem, provides kernel relocation and replication. Required on SGI SN. You can pply additionally one of the zonelist patches and the discontig-proc_info patch from the previous release. The ACPI part of the patch has been radically changed, it fits into the structure (arch-dependend + independent) proposed by Tak Kouchi. This part is functional and useful even without discontigmem. It basically gathers the NUMA related information and puts it into the structures node_memblk, node_cpuid, numa_slit. These contain, respectively, the affinity information of memory blocks, cpus and the locality information of the nodes. The code is quite arch-independent and could be used by other architectures which have ACPI SRAT/SLIT information. The patches are building blocks for the discontigmem needs on IA64: NEC Azusa/Asama, DIG64: required: acpi-numa + core, optional: krel-krep SGI SN : required: acpi + core + krel-krep For those involved into the DIG-discontigmem development: I've set CHUNKSIZE and CLUMPSIZE to be equal in mmzone_dig_numa.h. This avoids some pitfalls and we expect anyway contiguous physical memory here, so it doesn't matter. The patch is tested on 4 node Azusa. I left out the phoney SRAT/SLIT tables, they are now slightly more difficult to parse without extra code, so I'm afraid right now there's no way to test pseudo-NUMA on BigSur or Tiger. Best regards, Erich