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authorBalbir Singh <balbir@linux.vnet.ibm.com>2008-02-01 15:57:31 +1100
committerPaul Mackerras <paulus@samba.org>2008-02-07 11:40:19 +1100
commit1daa6d08d1257aa61f376c3cc4795660877fb9e3 (patch)
treeb53407c6dd9b3b310bdc203681ba528460612e0d /arch/powerpc/boot/wrapper
parent7dbb922cea70897dd0e76c6cf8a300b061ca2531 (diff)
[POWERPC] Fake NUMA emulation for PowerPC
Here's a dumb simple implementation of fake NUMA nodes for PowerPC. Fake NUMA nodes can be specified using the following command line option numa=fake=<node range> node range is of the format <range1>,<range2>,...<rangeN> Each of the rangeX parameters is passed using memparse(). I find the patch useful for fake NUMA emulation on my simple PowerPC machine. I've tested it on a numa box with the following arguments numa=fake=512M numa=fake=512M,768M numa=fake=256M,512M mem=512M numa=fake=1G mem=768M numa=fake= without any numa= argument The other side-effect introduced by this patch is that; in the case where we don't have NUMA information, we now set a node online after adding each LMB. This node could very well be node 0, but in the case that we enable fake NUMA nodes, when we cross node boundaries, we need to set the new node online. Signed-off-by: Balbir Singh <balbir@linux.vnet.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
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