[apple/xnu.git] / osfmk / default_pager / default_pager.c

/*
 * Copyright (c) 2001, 2000 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this
 * file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
/*
 * @OSF_COPYRIGHT@
 */
/* 
 * Mach Operating System
 * Copyright (c) 1991,1990,1989 Carnegie Mellon University
 * All Rights Reserved.
 * 
 * Permission to use, copy, modify and distribute this software and its
 * documentation is hereby granted, provided that both the copyright
 * notice and this permission notice appear in all copies of the
 * software, derivative works or modified versions, and any portions
 * thereof, and that both notices appear in supporting documentation.
 * 
 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
 * 
 * Carnegie Mellon requests users of this software to return to
 * 
 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
 *  School of Computer Science
 *  Carnegie Mellon University
 *  Pittsburgh PA 15213-3890
 * 
 * any improvements or extensions that they make and grant Carnegie Mellon
 * the rights to redistribute these changes.
 */

/*
 * 	Default pager.
 * 		Threads management.
 *		Requests handling.
 */

#include "default_pager_internal.h"
#include <kern/host.h>
#include <kern/ledger.h>
#include <mach/host_info.h>
#include <ipc/ipc_space.h>
#include <vm/vm_kern.h>

char	my_name[] = "(default pager): ";

#if	DEFAULT_PAGER_DEBUG
int	debug_mask = 0;
#endif	/* DEFAULT_PAGER_DEBUG */

/*
 * Use 16 Kbyte stacks instead of the default 64K.
 * Use 4 Kbyte waiting stacks instead of the default 8K.
 */

vm_size_t	cthread_stack_size = 16 *1024;
extern vm_size_t cthread_wait_stack_size;

unsigned long long	vm_page_mask;
int		vm_page_shift;

int 		norma_mk;

boolean_t	verbose;

/* task_t default_pager_self; */	/* Our task port. */
mutex_t			dpt_lock;       /* lock for the dpt array struct */
default_pager_thread_t	**dpt_array;

memory_object_default_t default_pager_object; /* for memory_object_create. */

MACH_PORT_FACE default_pager_default_set; /* Port set for "default" thread. */
MACH_PORT_FACE default_pager_internal_set; /* Port set for internal objects. */
MACH_PORT_FACE default_pager_external_set; /* Port set for external objects. */

#define DEFAULT_PAGER_INTERNAL_COUNT	(4)


/* Memory created by default_pager_object_create should mostly be resident. */
#define DEFAULT_PAGER_EXTERNAL_COUNT	(2)

unsigned int	default_pager_internal_count = DEFAULT_PAGER_INTERNAL_COUNT;
/* Number of "internal" threads. */
unsigned int	default_pager_external_count = DEFAULT_PAGER_EXTERNAL_COUNT;
/* Number of "external" threads. */

/*
 * Forward declarations.
 */
boolean_t default_pager_notify_server(mach_msg_header_t *,
				      mach_msg_header_t *);
boolean_t default_pager_demux_object(mach_msg_header_t *,
				     mach_msg_header_t *);
boolean_t default_pager_demux_default(mach_msg_header_t *,
				      mach_msg_header_t *);
default_pager_thread_t *start_default_pager_thread(int, boolean_t);
void	default_pager(void);
void	default_pager_thread(void *);
void	default_pager_initialize(void);
void	default_pager_set_policy(MACH_PORT_FACE);
boolean_t	dp_parse_argument(char *);	/* forward; */
unsigned int	d_to_i(char *);			/* forward; */


extern int vstruct_def_clshift;


/*
 * Initialize and Run the default pager
 */
void
default_pager(void)
{
	int			i, id;
	static char		here[] = "default_pager";
	mach_msg_options_t 	server_options;
	default_pager_thread_t	dpt;
	kern_return_t kr;


	/*
	 * Give me space for the thread array and zero it.
	 */
	i = default_pager_internal_count + default_pager_external_count + 1;
	dpt_array = (default_pager_thread_t **)
	    kalloc(i * sizeof(default_pager_thread_t *));
	memset(dpt_array, 0, i * sizeof(default_pager_thread_t *));

	/* Setup my thread structure.  */
	id = 0;
	dpt.dpt_buffer = 0;
	dpt.dpt_internal = FALSE;
	dpt.dpt_initialized_p = TRUE;
	dpt_array[0] = &dpt;

	/*
	 * Now we create the threads that will actually
	 * manage objects.
	 */

	for (i = 0; i < default_pager_internal_count; i++) {
		dpt_array[id] = (default_pager_thread_t *)
				kalloc(sizeof (default_pager_thread_t));
		if (dpt_array[id] == NULL)
	 		Panic("alloc pager thread");
		kr = vm_allocate(kernel_map, &((dpt_array[id])->dpt_buffer),
				 vm_page_size << vstruct_def_clshift, TRUE);
		if (kr != KERN_SUCCESS)
			Panic("alloc thread buffer");
		kr = vm_map_wire(kernel_map, (dpt_array[id])->dpt_buffer, 
			((dpt_array[id])->dpt_buffer)
					+(vm_page_size << vstruct_def_clshift), 
			VM_PROT_DEFAULT,
			FALSE);
		if (kr != KERN_SUCCESS)
			Panic("wire thread buffer");
		(dpt_array[id])->dpt_internal = TRUE;
		(dpt_array[id])->dpt_initialized_p = TRUE;
		(dpt_array[id])->checked_out = FALSE;
		id++;
	}
	DPT_LOCK_INIT(dpt_lock);
}


/* simple utility: only works for 2^n */
int
local_log2(
	unsigned int n)
{
	register int	i = 0;

	if(n == 0) return 0;

	while ((n & 1) == 0) {
		i++;
		n >>= 1;
	}
	return i;
}


/* another simple utility, d_to_i(char*) supporting only decimal
 * and devoid of range checking; obscure name chosen deliberately
 * to avoid confusion with semantic-rich POSIX routines */
unsigned int
d_to_i(char * arg)
{
    unsigned int rval = 0;
    char ch;

    while ((ch = *arg++) && ch >= '0' && ch <= '9') {
	rval *= 10;
	rval += ch - '0';
    }
    return(rval);
}


/*
 * Check for non-disk-partition arguments of the form
 *	attribute=argument
 * returning TRUE if one if found
 */
boolean_t dp_parse_argument(char *av)
{
	char *rhs = av;
	static char	here[] = "dp_parse_argument";

	/* Check for '-v' flag */

	if (av[0] == '-' && av[1] == 'v' && av[2] == 0) {
		verbose = TRUE ;
		return TRUE;
	}

	/*
	 * If we find a '=' followed by an argument in the string,
	 * check for known arguments
	 */
	while (*rhs && *rhs != '=')
		rhs++;
	if (*rhs && *++rhs) {
		/* clsize=N pages */
		if (strprefix(av,"cl")) {
			if (!bs_set_default_clsize(d_to_i(rhs)))
				dprintf(("Bad argument (%s) - ignored\n", av));
			return(TRUE);
		}
		/* else if strprefix(av,"another_argument")) {
			handle_another_argument(av);
			return(TRUE);
		} */
	}
	return(FALSE);
}

int
start_def_pager(char *bs_device)
{
	int			my_node;
/*
	MACH_PORT_FACE		master_device_port;
*/
	MACH_PORT_FACE		security_port;
/*
	MACH_PORT_FACE		root_ledger_wired;
	MACH_PORT_FACE		root_ledger_paged;
*/
	static char		here[] = "main";
	int			need_dp_init = 1;


/*
	default_pager_host_port = ipc_port_make_send(realhost.host_priv_self);
	master_device_port = ipc_port_make_send(master_device_port);
	root_ledger_wired = ipc_port_make_send(root_wired_ledger_port);
	root_ledger_paged = ipc_port_make_send(root_paged_ledger_port);
*/
	security_port = ipc_port_make_send(realhost.host_security_self);


#if NORMA_VM
	norma_mk = 1;
#else
	norma_mk = 0;
#endif


	/* setup read buffers, etc */
	default_pager_initialize();
	default_pager();
}

/*
 * Return TRUE if string 2 is a prefix of string 1.
 */     
boolean_t       
strprefix(register const char *s1, register const char *s2)
{               
        register int    c;
                
        while ((c = *s2++) != '\0') {
            if (c != *s1++) 
                return (FALSE);
        }       
        return (TRUE);
}


kern_return_t
default_pager_info(
	memory_object_default_t	pager,
	default_pager_info_t	*infop)
{
	vm_size_t	pages_total, pages_free;

	if (pager != default_pager_object)
		return KERN_INVALID_ARGUMENT; 

	bs_global_info(&pages_total, &pages_free);

	infop->dpi_total_space = ptoa_32(pages_total);
	infop->dpi_free_space = ptoa_32(pages_free);
	infop->dpi_page_size = vm_page_size;

	return KERN_SUCCESS;
}


void
default_pager_initialize()
{
	kern_return_t		kr;
	static char		here[] = "default_pager_initialize";


	/*
	 * Vm variables.
	 */
	vm_page_mask = vm_page_size - 1;
	vm_page_shift = local_log2(vm_page_size);

	/*
	 * List of all vstructs.
	 */
	vstruct_zone = zinit(sizeof(struct vstruct),
			     10000 * sizeof(struct vstruct),
			     8192, "vstruct zone");
	VSL_LOCK_INIT();
	queue_init(&vstruct_list.vsl_queue);
	vstruct_list.vsl_count = 0;

	VSTATS_LOCK_INIT(&global_stats.gs_lock);

	bs_initialize();

	/*
	 * Exported DMM port.
	 */
	default_pager_object = ipc_port_alloc_kernel();


	/*
	 * Export pager interfaces.
	 */
#ifdef	USER_PAGER
	if ((kr = netname_check_in(name_server_port, "UserPager",
				   default_pager_self,
				   default_pager_object))
	    != KERN_SUCCESS) {
		dprintf(("netname_check_in returned 0x%x\n", kr));
		exit(1);
	}
#else	/* USER_PAGER */
	{
		int clsize;
		memory_object_default_t dmm;

		dmm = default_pager_object;
		clsize = (vm_page_size << vstruct_def_clshift);
		kr = host_default_memory_manager(host_priv_self(), &dmm, clsize);
		if ((kr != KERN_SUCCESS) ||
		    (dmm != MEMORY_OBJECT_DEFAULT_NULL))
			Panic("default memory manager");

	}
#endif	/* USER_PAGER */


}
Commit	Line	Data
1c79356b	1	/*
0b4e3aa0	2	* Copyright (c) 2001, 2000 Apple Computer, Inc. All rights reserved.
1c79356b A	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
d7e50217	6	* Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved.
1c79356b	7	*
d7e50217 A	8	* This file contains Original Code and/or Modifications of Original Code
	9	* as defined in and that are subject to the Apple Public Source License
	10	* Version 2.0 (the 'License'). You may not use this file except in
	11	* compliance with the License. Please obtain a copy of the License at
	12	* http://www.opensource.apple.com/apsl/ and read it before using this
	13	* file.
	14	*
	15	* The Original Code and all software distributed under the License are
	16	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
1c79356b A	17	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
1c79356b A	18	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
d7e50217 A	19	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	20	* Please see the License for the specific language governing rights and
	21	* limitations under the License.
1c79356b A	22	*
	23	* @APPLE_LICENSE_HEADER_END@
	24	*/
	25	/*
	26	* @OSF_COPYRIGHT@
	27	*/
1c79356b A	28	/*
	29	* Mach Operating System
	30	* Copyright (c) 1991,1990,1989 Carnegie Mellon University
	31	* All Rights Reserved.
	32	*
	33	* Permission to use, copy, modify and distribute this software and its
	34	* documentation is hereby granted, provided that both the copyright
	35	* notice and this permission notice appear in all copies of the
	36	* software, derivative works or modified versions, and any portions
	37	* thereof, and that both notices appear in supporting documentation.
	38	*
	39	* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
	40	* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
	41	* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
	42	*
	43	* Carnegie Mellon requests users of this software to return to
	44	*
	45	* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
	46	* School of Computer Science
	47	* Carnegie Mellon University
	48	* Pittsburgh PA 15213-3890
	49	*
	50	* any improvements or extensions that they make and grant Carnegie Mellon
	51	* the rights to redistribute these changes.
	52	*/
	53
	54	/*
	55	* Default pager.
	56	* Threads management.
	57	* Requests handling.
	58	*/
	59
	60	#include "default_pager_internal.h"
	61	#include <kern/host.h>
	62	#include <kern/ledger.h>
	63	#include <mach/host_info.h>
	64	#include <ipc/ipc_space.h>
	65	#include <vm/vm_kern.h>
	66
	67	char my_name[] = "(default pager): ";
	68
	69	#if DEFAULT_PAGER_DEBUG
	70	int debug_mask = 0;
	71	#endif /* DEFAULT_PAGER_DEBUG */
	72
	73	/*
	74	* Use 16 Kbyte stacks instead of the default 64K.
	75	* Use 4 Kbyte waiting stacks instead of the default 8K.
	76	*/
	77
	78	vm_size_t cthread_stack_size = 16 *1024;
	79	extern vm_size_t cthread_wait_stack_size;
	80
	81	unsigned long long vm_page_mask;
	82	int vm_page_shift;
	83
	84	int norma_mk;
	85
	86	boolean_t verbose;
	87
	88	/* task_t default_pager_self; / / Our task port. */
	89	mutex_t dpt_lock; /* lock for the dpt array struct */
	90	default_pager_thread_t **dpt_array;
	91
0b4e3aa0 A	92	memory_object_default_t default_pager_object; /* for memory_object_create. */
0b4e3aa0 A	93
1c79356b	94	MACH_PORT_FACE default_pager_default_set; /* Port set for "default" thread. */
1c79356b A	95	MACH_PORT_FACE default_pager_internal_set; /* Port set for internal objects. */
	96	MACH_PORT_FACE default_pager_external_set; /* Port set for external objects. */
	97
	98	#define DEFAULT_PAGER_INTERNAL_COUNT (4)
	99
	100
	101	/* Memory created by default_pager_object_create should mostly be resident. */
	102	#define DEFAULT_PAGER_EXTERNAL_COUNT (2)
	103
	104	unsigned int default_pager_internal_count = DEFAULT_PAGER_INTERNAL_COUNT;
	105	/* Number of "internal" threads. */
	106	unsigned int default_pager_external_count = DEFAULT_PAGER_EXTERNAL_COUNT;
	107	/* Number of "external" threads. */
	108
	109	/*
	110	* Forward declarations.
	111	*/
	112	boolean_t default_pager_notify_server(mach_msg_header_t *,
	113	mach_msg_header_t *);
	114	boolean_t default_pager_demux_object(mach_msg_header_t *,
	115	mach_msg_header_t *);
	116	boolean_t default_pager_demux_default(mach_msg_header_t *,
	117	mach_msg_header_t *);
	118	default_pager_thread_t *start_default_pager_thread(int, boolean_t);
	119	void default_pager(void);
	120	void default_pager_thread(void *);
	121	void default_pager_initialize(void);
	122	void default_pager_set_policy(MACH_PORT_FACE);
	123	boolean_t dp_parse_argument(char ); / forward; */
	124	unsigned int d_to_i(char ); / forward; */
	125
	126
	127	extern int vstruct_def_clshift;
	128
	129
	130	/*
	131	* Initialize and Run the default pager
	132	*/
	133	void
	134	default_pager(void)
	135	{
	136	int i, id;
	137	static char here[] = "default_pager";
	138	mach_msg_options_t server_options;
	139	default_pager_thread_t dpt;
	140	kern_return_t kr;
	141
	142
	143
	144	/*
	145	* Give me space for the thread array and zero it.
	146	*/
	147	i = default_pager_internal_count + default_pager_external_count + 1;
	148	dpt_array = (default_pager_thread_t **)
	149	kalloc(i * sizeof(default_pager_thread_t *));
	150	memset(dpt_array, 0, i * sizeof(default_pager_thread_t *));
	151
	152	/* Setup my thread structure. */
	153	id = 0;
	154	dpt.dpt_buffer = 0;
	155	dpt.dpt_internal = FALSE;
	156	dpt.dpt_initialized_p = TRUE;
	157	dpt_array[0] = &dpt;
	158
159	/*
160	* Now we create the threads that will actually
161	* manage objects.
162	*/
163
164	for (i = 0; i < default_pager_internal_count; i++) {
165	dpt_array[id] = (default_pager_thread_t *)
166	kalloc(sizeof (default_pager_thread_t));
167	if (dpt_array[id] == NULL)
168	Panic("alloc pager thread");
169	kr = vm_allocate(kernel_map, &((dpt_array[id])->dpt_buffer),
170	vm_page_size << vstruct_def_clshift, TRUE);
171	if (kr != KERN_SUCCESS)
172	Panic("alloc thread buffer");
173	kr = vm_map_wire(kernel_map, (dpt_array[id])->dpt_buffer,
174	((dpt_array[id])->dpt_buffer)
175	+(vm_page_size << vstruct_def_clshift),
176	VM_PROT_DEFAULT,
177	FALSE);
178	if (kr != KERN_SUCCESS)
179	Panic("wire thread buffer");
180	(dpt_array[id])->dpt_internal = TRUE;
181	(dpt_array[id])->dpt_initialized_p = TRUE;
182	(dpt_array[id])->checked_out = FALSE;
183	id++;
184	}
185	DPT_LOCK_INIT(dpt_lock);
186	}
187
188
189
190
191
192
193	/* simple utility: only works for 2^n */
194	int
195	local_log2(
196	unsigned int n)
197	{
198	register int i = 0;
199
200	if(n == 0) return 0;
201
202	while ((n & 1) == 0) {
203	i++;
204	n >>= 1;
205	}
206	return i;
207	}
208
209
210
211
212	/* another simple utility, d_to_i(char*) supporting only decimal
213	* and devoid of range checking; obscure name chosen deliberately
214	* to avoid confusion with semantic-rich POSIX routines */
215	unsigned int
216	d_to_i(char * arg)
217	{
218	unsigned int rval = 0;
219	char ch;
220
221	while ((ch = *arg++) && ch >= '0' && ch <= '9') {
222	rval *= 10;
223	rval += ch - '0';
224	}
225	return(rval);
226	}
227
228
229
230
231	/*
232	* Check for non-disk-partition arguments of the form
233	* attribute=argument
234	* returning TRUE if one if found
235	*/
236	boolean_t dp_parse_argument(char *av)
237	{
238	char *rhs = av;
239	static char here[] = "dp_parse_argument";
240
241	/* Check for '-v' flag */
242
243	if (av[0] == '-' && av[1] == 'v' && av[2] == 0) {
244	verbose = TRUE ;
245	return TRUE;
246	}
247
248	/*
249	* If we find a '=' followed by an argument in the string,
250	* check for known arguments
251	*/
252	while (rhs && rhs != '=')
253	rhs++;
254	if (rhs && ++rhs) {
255	/* clsize=N pages */
256	if (strprefix(av,"cl")) {
257	if (!bs_set_default_clsize(d_to_i(rhs)))
258	dprintf(("Bad argument (%s) - ignored\n", av));
259	return(TRUE);
260	}
261	/* else if strprefix(av,"another_argument")) {
262	handle_another_argument(av);
263	return(TRUE);
264	} */
265	}
266	return(FALSE);
267	}
268
269	int
270	start_def_pager(char *bs_device)
271	{
272	int my_node;
273	/*
274	MACH_PORT_FACE master_device_port;
275	*/
276	MACH_PORT_FACE security_port;
277	/*
278	MACH_PORT_FACE root_ledger_wired;
279	MACH_PORT_FACE root_ledger_paged;
280	*/
281	static char here[] = "main";
282	int need_dp_init = 1;
283
284
285
286	/*
287	default_pager_host_port = ipc_port_make_send(realhost.host_priv_self);
288	master_device_port = ipc_port_make_send(master_device_port);
289	root_ledger_wired = ipc_port_make_send(root_wired_ledger_port);
290	root_ledger_paged = ipc_port_make_send(root_paged_ledger_port);
291	*/
292	security_port = ipc_port_make_send(realhost.host_security_self);
293
294
295	#if NORMA_VM
296	norma_mk = 1;
297	#else
298	norma_mk = 0;
299	#endif
300
301
302	/* setup read buffers, etc */
303	default_pager_initialize();
304	default_pager();
305	}
306
307	/*
308	* Return TRUE if string 2 is a prefix of string 1.
309	*/
310	boolean_t
311	strprefix(register const char s1, register const char s2)
312	{
313	register int c;
314
315	while ((c = *s2++) != '\0') {
316	if (c != *s1++)
317	return (FALSE);
318	}
319	return (TRUE);
320	}
321
322
323	kern_return_t
324	default_pager_info(
0b4e3aa0	325	memory_object_default_t pager,
1c79356b A	326	default_pager_info_t *infop)
	327	{
	328	vm_size_t pages_total, pages_free;
	329
0b4e3aa0	330	if (pager != default_pager_object)
1c79356b A	331	return KERN_INVALID_ARGUMENT;
	332
	333	bs_global_info(&pages_total, &pages_free);
	334
d7e50217 A	335	infop->dpi_total_space = ptoa_32(pages_total);
d7e50217 A	336	infop->dpi_free_space = ptoa_32(pages_free);
1c79356b A	337	infop->dpi_page_size = vm_page_size;
	338
	339	return KERN_SUCCESS;
	340	}
	341
	342
	343	void
	344	default_pager_initialize()
	345	{
	346	kern_return_t kr;
	347	static char here[] = "default_pager_initialize";
	348
	349
0b4e3aa0 A	350	/*
	351	* Vm variables.
	352	*/
	353	vm_page_mask = vm_page_size - 1;
	354	vm_page_shift = local_log2(vm_page_size);
	355
	356	/*
	357	* List of all vstructs.
	358	*/
	359	vstruct_zone = zinit(sizeof(struct vstruct),
	360	10000 * sizeof(struct vstruct),
	361	8192, "vstruct zone");
	362	VSL_LOCK_INIT();
	363	queue_init(&vstruct_list.vsl_queue);
	364	vstruct_list.vsl_count = 0;
	365
	366	VSTATS_LOCK_INIT(&global_stats.gs_lock);
	367
	368	bs_initialize();
	369
1c79356b A	370	/*
	371	* Exported DMM port.
	372	*/
0b4e3aa0	373	default_pager_object = ipc_port_alloc_kernel();
1c79356b A	374
	375
	376	/*
	377	* Export pager interfaces.
	378	*/
	379	#ifdef USER_PAGER
	380	if ((kr = netname_check_in(name_server_port, "UserPager",
	381	default_pager_self,
0b4e3aa0	382	default_pager_object))
1c79356b A	383	!= KERN_SUCCESS) {
	384	dprintf(("netname_check_in returned 0x%x\n", kr));
	385	exit(1);
	386	}
	387	#else /* USER_PAGER */
	388	{
	389	int clsize;
0b4e3aa0	390	memory_object_default_t dmm;
1c79356b	391
0b4e3aa0	392	dmm = default_pager_object;
1c79356b	393	clsize = (vm_page_size << vstruct_def_clshift);
0b4e3aa0 A	394	kr = host_default_memory_manager(host_priv_self(), &dmm, clsize);
	395	if ((kr != KERN_SUCCESS) \|\|
	396	(dmm != MEMORY_OBJECT_DEFAULT_NULL))
1c79356b A	397	Panic("default memory manager");
	398
	399	}
	400	#endif /* USER_PAGER */
	401
	402
1c79356b A	403	}
1c79356b A	404