From mboxrd@z Thu Jan 1 00:00:00 1970 From: Erich Focht Date: Fri, 09 Aug 2002 15:41:02 +0000 Subject: [Linux-ia64] Re: 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 It turned out that some variables needed by SGI_SN were freed too early in the previous release 20020807-split. Used the opportunity to make the ACPI patch DISCONTIG-independent, the include files asm/mmzone.h and asm/mmzone_dig_numa.h were moved from the acpi-numa patch to the core patch. The updates are at http://sf.net/project/showfiles.php?group_id=35660 Regards, Erich On Thursday 08 August 2002 18:40, Erich Focht wrote: > 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.