On 8/15/17 1:11 PM, Jesper Dangaard Brouer wrote: > diff --git a/include/trace/events/qdisc.h b/include/trace/events/qdisc.h > new file mode 100644 > index 000000000000..60d0d8bd336d > --- /dev/null > +++ b/include/trace/events/qdisc.h > @@ -0,0 +1,50 @@ > +#undef TRACE_SYSTEM > +#define TRACE_SYSTEM qdisc > + > +#if !defined(_TRACE_QDISC_H) || defined(TRACE_HEADER_MULTI_READ) > +#define _TRACE_QDISC_H_ > + > +#include <linux/skbuff.h> > +#include <linux/netdevice.h> > +#include <linux/tracepoint.h> > +#include <linux/ftrace.h> > + > +TRACE_EVENT(qdisc_dequeue, > + > + TP_PROTO(struct Qdisc *qdisc, const struct netdev_queue *txq, > + int packets, struct sk_buff *skb), > + > + TP_ARGS(qdisc, txq, packets, skb), > + > + TP_STRUCT__entry( > + __field( struct Qdisc *, qdisc ) > + __field(const struct netdev_queue *, txq )
Why save qdisc and txq pointers in the tracepoint data?
