mm/vmscan: add tracepoints for node reclaim (132bb8cf) · Commits · 戴 / test

include/trace/events/vmscan.h

+32 −0

Original line number	Diff line number	Diff line
		@@ -469,6 +469,38 @@ TRACE_EVENT(mm_vmscan_inactive_list_is_low,
		__entry->ratio,
		show_reclaim_flags(__entry->reclaim_flags))
		);

		TRACE_EVENT(mm_vmscan_node_reclaim_begin,

		TP_PROTO(int nid, int order, gfp_t gfp_flags),

		TP_ARGS(nid, order, gfp_flags),

		TP_STRUCT__entry(
		__field(int, nid)
		__field(int, order)
		__field(gfp_t, gfp_flags)
		),

		TP_fast_assign(
		__entry->nid = nid;
		__entry->order = order;
		__entry->gfp_flags = gfp_flags;
		),

		TP_printk("nid=%d order=%d gfp_flags=%s",
		__entry->nid,
		__entry->order,
		show_gfp_flags(__entry->gfp_flags))
		);

		DEFINE_EVENT(mm_vmscan_direct_reclaim_end_template, mm_vmscan_node_reclaim_end,

		TP_PROTO(unsigned long nr_reclaimed),

		TP_ARGS(nr_reclaimed)
		);

		#endif /* _TRACE_VMSCAN_H */

		/* This part must be outside protection */

+6 −0

Original line number	Diff line number	Diff line
		@@ -4111,6 +4111,9 @@ static int __node_reclaim(struct pglist_data *pgdat, gfp_t gfp_mask, unsigned in
		.reclaim_idx = gfp_zone(gfp_mask),
		};

		trace_mm_vmscan_node_reclaim_begin(pgdat->node_id, order,
		sc.gfp_mask);

		cond_resched();
		fs_reclaim_acquire(sc.gfp_mask);
		/*
		@@ -4137,6 +4140,9 @@ static int __node_reclaim(struct pglist_data *pgdat, gfp_t gfp_mask, unsigned in
		current->flags &= ~PF_SWAPWRITE;
		memalloc_noreclaim_restore(noreclaim_flag);
		fs_reclaim_release(sc.gfp_mask);

		trace_mm_vmscan_node_reclaim_end(sc.nr_reclaimed);

		return sc.nr_reclaimed >= nr_pages;
		}