51 static	void	dovmstats(struct snapshot *old, struct snapshot *new);
60 	struct snapshot *old = NULL;  in main()  local
182 	dovmstats(old, ss);  in main()
189 		free_snapshot(old);  in main()
190 		old = ss;  in main()
194 			snapshot_report_changes(old, ss);  in main()
197 		if (snapshot_has_changed(old, ss)) {  in main()
198 			free_snapshot(old);  in main()
199 			old = NULL;  in main()
202 		dovmstats(old, ss);  in main()
205 	free_snapshot(old);  in main()
212 #define	DELTA(v) (new->v - (old ? old->v : 0))
222 	struct iodev_snapshot *old = (struct iodev_snapshot *)v1;  in show_disk()  local
231 	if (old)  in show_disk()
232 		oldtime = old->is_stats.wlastupdate;  in show_disk()
236 	reads = new->is_stats.reads - (old ? old->is_stats.reads : 0);  in show_disk()
237 	writes = new->is_stats.writes - (old ? old->is_stats.writes : 0);  in show_disk()
242 dovmstats(struct snapshot *old, struct snapshot *new)  in dovmstats()  argument
254 	if (old) {  in dovmstats()
255 		oldsys = &old->s_sys.ss_agg_sys;  in dovmstats()
256 		oldvm = &old->s_sys.ss_agg_vm;  in dovmstats()
340 	(void) snapshot_walk(SNAP_IODEVS, old, new, show_disk, NULL);  in dovmstats()