[PATCH 0/2] powercap: idle_inject: Create threads on demand

[Daniel Lezcano]

On 11/3/26 00:09, Daniel Lezcano wrote:
> Idle injection currently registers per-CPU kernel threads during early
> initialization, including on CPUs for which no idle injection device
> will be registered.
> 
> This series makes thread creation follow the lifetime and CPU mask of
> each idle injection device.
> 
> The first patch adds an optional CPU mask to smpboot thread descriptors.
> The mask restricts thread creation, CPU hotplug handling and teardown,
> while preserving the existing behavior for descriptors without a mask.
> 
> The second patch uses this support to register idle injection threads
> when a device registers and destroy them when it unregisters. CPU
> ownership claims, registration rollback and thread teardown are
> serialized to prevent overlapping registrations from sharing threads.
> 
> Validation includes W=1 builds of the affected objects, whitespace
> checks and static review of the teardown locking paths. Concurrent
> registration and CPU hotplug runtime testing remains outstanding.
> 
> The series was tested on Rockchip RK3588.

One thing not specified in this cover is which tree these changes have 
to go through ?
> Cc: Andrew Morton <akpm at linux-foundation.org>
> Cc: Rafael J. Wysocki <rafael at kernel.org>
> 
> Daniel Lezcano (2):
>    smpboot: Allow restricting per-CPU threads to a CPU mask
>    powercap: idle_inject: Create per-CPU threads on registration
> 
>   drivers/powercap/idle_inject.c | 69 +++++++++++++++++++++-------------
>   include/linux/smpboot.h        |  4 ++
>   kernel/smpboot.c               | 17 ++++++++-
>   3 files changed, 61 insertions(+), 29 deletions(-)
> 
> 
> base-commit: c03c1a14507dfaf8b856c2608f9ac216021fc222