Re: [PATCH v2] Fix fake numa on ppc

On Wed, 2 Sep 2009, Ankita Garg wrote:

Currently, the behavior of fake numa is not so on x86 as well? Below is
a sample output from a single node x86 system booted with numa=fake=8:

# cat node0/cpulist

# cat node1/cpulist

...
# cat node6/cpulist

# cat node7/cpulist
0-7

Presently, just fixing the cpu association issue with ppc, as explained
in my previous mail.

Right, I'm proposing an alternate mapping scheme (which we've used for 
years) for both platforms such that a cpu is bound (and is set in 
cpumask_of_node()) to each fake node with which it has physical affinity.  
That is the only way for zonelist ordering in node order, task migration 
from offlined cpus, correct sched domains, etc.  I can propose a patchset 
for x86_64 to do exactly this if there aren't any objections and I hope 
you'll help do ppc.