On 2019-03-06 17:57:09 [+0800], Yongxin Liu wrote: > In this change, we replace get_cpu/put_cpu with local_lock_cpu/ > local_unlock_cpu, and introduce per CPU variable "ndl_local_lock". > Due to preemption on RT, this lock can avoid race condition for the > same lane on the same CPU. When CPU number is greater than the lane > number, lane can be shared among CPUs. "ndl_lock->lock" is used to > protect the lane in this situation. so what was the reason that get_cpu() can't be replaced with raw_smp_processor_id()? Sebastian
