On Tue, 21 Apr 2020 09:07:55 -0400 Waiman Long <longman@xxxxxxxxxx> wrote: > diff --git a/include/trace/events/iocost.h b/include/trace/events/iocost.h > index 7ecaa65b7106..c2f580fd371b 100644 > --- a/include/trace/events/iocost.h > +++ b/include/trace/events/iocost.h > @@ -130,7 +130,7 @@ DEFINE_EVENT(iocg_inuse_update, iocost_inuse_reset, > > TRACE_EVENT(iocost_ioc_vrate_adj, > > - TP_PROTO(struct ioc *ioc, u64 new_vrate, u32 (*missed_ppm)[2], > + TP_PROTO(struct ioc *ioc, u64 new_vrate, u32 *missed_ppm, > u32 rq_wait_pct, int nr_lagging, int nr_shortages, > int nr_surpluses), > > @@ -155,8 +155,8 @@ TRACE_EVENT(iocost_ioc_vrate_adj, > __entry->old_vrate = atomic64_read(&ioc->vtime_rate);; > __entry->new_vrate = new_vrate; > __entry->busy_level = ioc->busy_level; > - __entry->read_missed_ppm = (*missed_ppm)[READ]; > - __entry->write_missed_ppm = (*missed_ppm)[WRITE]; > + __entry->read_missed_ppm = missed_ppm[READ]; > + __entry->write_missed_ppm = missed_ppm[WRITE]; > __entry->rq_wait_pct = rq_wait_pct; > __entry->nr_lagging = nr_lagging; > __entry->nr_shortages = nr_shortages; Regardless if this helps systemtap or not, I like the patch because the current code is rather ugly, and this patch makes it more readable. Suggestion: change the topic to remove systemtap, as that's not going to be the true reason for acceptance of this patch. It should just be about cleaning up the trace event itself. Acked-by: Steven Rostedt (VMware) <rostedt@xxxxxxxxxxx> -- Steve
