Re: [PATCH 2.6.16-mm2 4/4] sched_domain: Allocate sched_group structures dynamically

[Srivatsa Vaddagiri]

On Sun, Apr 02, 2006 at 03:21:21PM +1000, Nick Piggin wrote:
> Then after you have allocated sched_group_phys, subsequent cpus
> in cpu_map will have their sched_group_phys_bycpu[] entry
> uninitialised, by the looks?

Not all the CPUs in cpu_map need to have an entry in 
sched_group_phys_bycpu[]. sched_group_phys_bycpu[] is purely used to
"remember" the chunk of memory we allocated for sched_group array
for later freeing. Individual CPU's in cpu_map point to a suitable entry 
in the sched_group array (thr' their phys_domains structure), as in the 
following lines of code after memory allocation:

	sd = &per_cpu(phys_domains, i);

	...

	sd->groups = &sched_group_phys[group];


Hope this clarifies!

-- 
Regards,
vatsa
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