osfmk/kern/zalloc.c

107  * "zp-factor=N" as a boot-arg. To turn this feature off, set "zp-factor=0" or "-no-zp".
124  * want to set "zp-factor=1" or "-zp" if you are attempting to reproduce a known bug.
144 uint32_t 	free_check_sample_factor = 0;		/* set by zp-factor=N boot arg */
1447 	if (PE_parse_boot_argn("-zp", temp_buf, sizeof(temp_buf))) {
1450 	if (PE_parse_boot_argn("-no-zp", temp_buf, sizeof(temp_buf))) {
1454 	/* zp-factor=XXXX (override how often to poison freed zone elements) */
1455 	if (PE_parse_boot_argn("zp-factor", &free_check_sample_factor, sizeof(free_check_sample_factor))) {
2354 	struct zone_page_table_entry	*zp;
2369 		zp = zone_page_table_lookup(i);
2370 		if (zp->collect_count == zp->alloc_count)
2382 	struct zone_page_table_entry	*zp;
2397 		zp = zone_page_table_lookup(i);
2398 		zp->collect_count = 0;
2407 	struct zone_page_table_entry	*zp;
2422 		zp = zone_page_table_lookup(i);
2423 		++zp->collect_count;
2432 	struct zone_page_table_entry	*zp;
2450 		zp = zone_page_table_lookup(i);
2451 		assert(zp);
2452 		zp->alloc_count = ZONE_PAGE_UNUSED;
2453 		zp->collect_count = 0;
2462 	struct zone_page_table_entry	*zp;
2477 		zp = zone_page_table_lookup(i);
2478 		assert(zp);
2484 		if (zp->alloc_count == ZONE_PAGE_UNUSED)
2485 			zp->alloc_count = ZONE_PAGE_USED;
2487 		++zp->alloc_count;
2498 	struct zone_page_table_entry	*zp;
2513 		zp = zone_page_table_lookup(i);
2515 		if (zp->collect_count > 0)
2516 			--zp->collect_count;
2517 		if (--zp->alloc_count == 0) {
2521 			zp->alloc_count  = ZONE_PAGE_UNUSED;
2522 			zp->collect_count = 0;
2619 		struct zone_page_table_entry	*zp;
2621 		zp = zone_page_table_lookup(i);
2622 		assert(!zp || (zp->collect_count == 0));