On Mon, Jul 13, 2015 at 09:55:39AM +0100, Jan Beulich wrote:
> >>> On 13.07.15 at 05:36, <chao.p.p...@linux.intel.com> wrote:
> > phys_proc_id is invalidated in remove_siblinginfo() which gets called
> > before cpu_smpboot_free(). This means calling cpu_to_socket(cpu) in
> > cpu_smpboot_free() is not possible to be correct.
> > 
> > This patch invokes remove_siblinginfo() in cpu_smpboot_free(),
> > immediately after the use for cpu_to_socket(cpu).
> 
> You having picked that variant of the two I proposed, did you verify
> that (as I said when talking about the alternative) there are no
> hidden dependencies? If you didn't, or if for whatever else reason
> there is any doubt, the less intrusive variant should be chosen at
> least for now.

I just did some basic tests but I don't think I can conclude that I
verified all the cases.

Because of this, I'm glad to follow your advice to have a gentle fix.

Chao

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