Re: [PATCH v3] x86: correct socket_cpumask allocation

[Andrew Cooper <andrew.cooper3@citrix.com>]

On 09/07/15 15:23, 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@oracle.com>
> Tested-by: Dario Faggioli <dario.faggioli@citrix.com>
> Signed-off-by: Chao Peng <chao.p.peng@linux.intel.com>

The v2 of this path seems to be holding up fine against the XenServer
test pool.  No failures to boot encountered so far.

Tested-by: Andrew Cooper <andrew.cooper3@citrix.com>

As the differences between v2 and v3 appear largely mechanical and not
functional in nature, this Tested-by can probably still stand.

~Andrew