On 12/20/21 12:28 PM, Wander Lairson Costa wrote: > The running_trace_lock protects running_trace_list and is acquired > within the tracepoint which implies disabled preemption. The spinlock_t > typed lock can not be acquired with disabled preemption on PREEMPT_RT > because it becomes a sleeping lock. > The runtime of the tracepoint depends on the number of entries in > running_trace_list and has no limit. The blk-tracer is considered debug > code and higher latencies here are okay. You didn't put a changelog in here. Was this one actually compiled? Was it runtime tested? -- Jens Axboe
