Re: [PATCH v13 08/13] sched/core: Push current task from non preferred CPU
From: sashiko-bot@kernel.org
Date: 2026-09-09 14:18:21
Actively push out the current running task on a non-preferred CPU. Since the task is currently running, a stopper thread must be queued to push the task out. However, if the task is pinned only to non-preferred CPUs, it will continue running there. This helps to maintain userspace affinities, unlike CPU hotplug or isolated cpusets. Though the code is similar to __balance_push_cpu_stop and quite close to push_cpu_stop, it is kept separate as it provides a cleaner implementation specifically for CONFIG_PREFERRED_CPU. Add the npc_push_work_pending flag to protect the work buffer. For now, only the currently running task is pushed out. This keeps the code simpler. In the future, an optimization may be added to move all queued tasks on the runqueue. This works only for the FAIR scheduling class. Signed-off-by: Shrikanth Hegde <sshegde@linux.ibm.com>
Sashiko has reviewed this patch and found no issues. It looks great! -- Sashiko AI review · https://sashiko.dev/#/patchset/20260909135617.871006-1-sshegde@linux.ibm.com?part=8