On 12/20/21 12:49 PM, Wander Costa wrote: > On Mon, Dec 20, 2021 at 4:38 PM Jens Axboe <axboe@xxxxxxxxx> wrote: >> >> 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? > > It feels like the changelog reached the inboxes after patch (at least > mine was so). Would you like that I send a v6 in the hope things > arrive in order? Not sure how you are sending them, but they don't appear to thread properly. But the changelog in the cover letter isn't really a changelog, it doesn't say what changed. -- Jens Axboe
