[RFC 2/3] kernel/cpu: Mark nonboot cpus as inactive when shutting down nonboot cpus

[Thomas Gleixner]

On Wed, Oct 29 2025 at 19:36, Pingfan Liu wrote:
> On Tue, Oct 28, 2025 at 01:59:11PM +0100, Thomas Gleixner wrote:
>> If you freeze stuff there is nothing to do. Hibernation works exactly
>> that way without any magic hacks in a particular scheduling class, no?
>> 
>
> There is a nuance: DL bandwidth represents a commitment, not necessarily
> the actual payload. Even a blocked DL task still occupies DL bandwidth.
> The system's DL bandwidth remains unchanged as long as the CPUs stay
> online, which is the case in hibernation.

No. Hibernation brings the non-boot CPUs down in order to create the
disk image.

Thanks,

        tglx