Re: [patch V3 00/12] rseq: Implement time slice extension mechanism

[Thomas Gleixner]

On Wed, Nov 12 2025 at 15:46, Mathieu Desnoyers wrote:
> On 2025-11-12 15:31, Thomas Gleixner wrote:
>> I did not notice the V3 issue because tests passed on a small machine,
>> but after I did a rebase to the tip rseq and uaccess bits, I noticed the
>> failure because I tested on a larger box.
>
> Good ! We'll see if this fixes the issue observed by Prakash. If not,
> I'm curious to validate that num_possible_cpus() is always set to its
> final value before _any_ mm is created.

It _is_ set to it's final value in start_kernel() before
setup_per_cpu_areas() is invoked. Otherwise the kernel would not work at
all.