Re: [Xen-devel] [PATCH v2] x86: correct socket_cpumask allocation

[Dario Faggioli <dario.faggioli@xxxxxxxxxx>]

On Thu, 2015-07-09 at 16:26 +0800, Chao Peng wrote:
> For booting cpu, the socket number is not needed to be 0 so
> it needs to be computed by cpu number.
> 
> For secondary cpu, phys_proc_id is not valid in CPU_PREPARE
> notifier(cpu_smpboot_alloc), so cpu_to_socket(cpu) can't be used.
> Instead, pre-allocate secondary_cpu_mask in cpu_smpboot_alloc()
> and later consume it in smp_store_cpu_info().
> 
> This patch also change socket_cpumask type from 'cpumask_var_t *'
> to 'cpumask_t **' so that smaller NR_CPUS works.
> 
> Reported-by: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
> Signed-off-by: Chao Peng <chao.p.peng@xxxxxxxxxxxxxxx>
> ---
> Changes in v2:
> * Fix case that booting cpu is on the socket other than socket0.
>
As far as this goes:

Tested-by: Dario Faggioli <dario.faggioli@xxxxxxxxxx>

Regards,
Dario

-- 
<<This happens because I choose it to happen!>> (Raistlin Majere)
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Dario Faggioli, Ph.D, http://about.me/dario.faggioli
Senior Software Engineer, Citrix Systems R&D Ltd., Cambridge (UK)

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