PROFILE_mmap_anon_no_contig_phys: profile ANON mmap()s that couldn't be backed by contiguous physical memory

kernel/include/profile.h

@@ -34,6 +34,7 @@ struct profile_event {
 enum profile_event_type {
 	PROFILE_page_fault = PROFILE_EVENT_MIN,
 	PROFILE_mpol_alloc_missed,
+	PROFILE_mmap_anon_no_contig_phys,
 	PROFILE_EVENT_MAX	/* Should be the last event type */
 };
 

kernel/profile.c

@@ -59,6 +59,7 @@ char *profile_event_names[] =
 {
 	"page_fault",
 	"mpol_alloc_missed",
+	"mmap_anon_no_contig_phys",
 	""
 };
 

kernel/syscall.c

@@ -1242,6 +1242,9 @@ do_mmap(const intptr_t addr0, const size_t len0, const int prot,
 			vrflags |= VR_DEMAND_PAGING;
 			populated_mapping = 0;
 
+#ifdef PROFILE_ENABLE
+			profile_event_add(PROFILE_mmap_anon_no_contig_phys, len);
+#endif // PROFILE_ENABLE
 			error = zeroobj_create(&memobj);
 			if (error) {
 				ekprintf("%s: zeroobj_create failed, error: %d\n",