On 2025-01-08 09:24:02 [+0800], Hou Tao wrote: > @Sebastian > Is it possible that softirq_expiry_lock is changed to a raw-spin-lock > instead ? No. The point is to PI-boost the timer-task by the task that is canceling the timer. This is possible if the timer-task got preempted by the canceling task - both can't be migrated to another CPU and if the canceling task has higher priority then it will continue to spin and live lock the system. Making the expire lock raw would also force every timer to run with disabled interrupts which would not allow to acquire any spinlock_t locks. Sebastian
