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SubjectRe: [PATCHSET] percpu: generalize first chunk allocators and improve lpage NUMA support
On Wed, 24 Jun 2009 22:30:06 +0900
Tejun Heo <tj@kernel.org> wrote:

> This patchset is available in the following git tree and will be
> published in for-next if there's no major objection. It might get
> rebased before going into for-next.
>
> git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu.git lpage-numa

<tries to read the patches>

Boy, this stuff is complicated. Does it all work?

The Impact: lines were useful :)


I assume from the tremendous number of for_each_possible_cpu()s that
CPU hotplug awareness won't be happening.

Do we have a feeling for the amount of wastage here? If

num_possible_cpus() - num_online_cpus() == N

and N is large, what did it cost?

And what are reasonable values of N?


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