On Wed, Jan 18, 2017 at 09:38:07AM -0500, Prarit Bhargava wrote:
>
>
> On 01/18/2017 05:45 AM, Greg Kroah-Hartman wrote:
> > 4.9-stable review patch. If anyone has any objections, please let me know.
> >
>
> Nack.
>
> The value of boot_cpu_data.logical_proc_id may be uninitialized and set to
> default -1 on systems that pick a random core as boot cpu. This was
> inadvertently fixed by 9d85eb9119f4 ("x86/smpboot: Make logical package
> management more robust") which is in 4.10-rc1.
>
> Before 9d85eb9119f4:
>
> [ 3.971539] hswep_uncore_cpu_init: cpu 5 pkg 0
> boot_cpu_data.logical_proc_id
> 65535
> [ 3.976504] hswep_uncore_cpu_init: cpu 5 pkg 0 cpu_data(0).logical_proc_id > 0
>
> After 9d85eb9119f4:
>
> [ 3.919112] hswep_uncore_cpu_init: cpu 5 pkg 0
> boot_cpu_data.logical_proc_id 0
> [ 3.923391] hswep_uncore_cpu_init: cpu 5 pkg 0 cpu_data(0).logical_proc_id > 0
>
> This patch should not be applied to any stable branch.
So the fixes: line lies? This isn't needed at all for 4.9?
confused,
greg k-h
