PROFILE_page_fault_XXX: more detailed page PF profiling

kernel/fileobj.c

@@ -414,6 +414,9 @@ static void fileobj_do_pageio(void *args0)
 		if (to_memobj(obj)->flags & MF_ZEROFILL) {
 			void *virt = phys_to_virt(page_to_phys(page));
 			memset(virt, 0, PAGE_SIZE);
+#ifdef PROFILE_ENABLE
+			profile_event_add(PROFILE_page_fault_file_clr, PAGE_SIZE);
+#endif // PROFILE_ENABLE
 		}
 		else {
 			page->mode = PM_PAGEIO;

kernel/include/profile.h

@@ -33,6 +33,8 @@ struct profile_event {
  */
 enum profile_event_type {
 	PROFILE_page_fault = PROFILE_EVENT_MIN,
+	PROFILE_page_fault_anon_clr,
+	PROFILE_page_fault_file_clr,
 	PROFILE_mpol_alloc_missed,
 	PROFILE_mmap_anon_contig_phys,
 	PROFILE_mmap_anon_no_contig_phys,

kernel/process.c

@@ -1676,6 +1676,9 @@ retry:
 			}
 			dkprintf("%s: clearing 0x%lx:%lu\n",
 					__FUNCTION__, pgaddr, pgsize);
+#ifdef PROFILE_ENABLE
+			profile_event_add(PROFILE_page_fault_anon_clr, pgsize);
+#endif // PROFILE_ENABLE
 			memset(virt, 0, pgsize);
 			phys = virt_to_phys(virt);
 			if (phys_to_page(phys)) {

kernel/profile.c

@@ -58,6 +58,8 @@ extern char *syscall_name[];
 char *profile_event_names[] =
 {
 	"page_fault",
+	"page_fault_anon_clr_mem",
+	"page_fault_file_clr_mem",
 	"mpol_alloc_missed",
 	"mmap_anon_contig_phys",
 	"mmap_anon_no_contig_phys",