5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21 /*
22 * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
24 */
25
26 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
27 /* All Rights Reserved */
28
29 /*
30 * University Copyright- Copyright (c) 1982, 1986, 1988
31 * The Regents of the University of California
32 * All Rights Reserved
33 *
34 * University Acknowledgment- Portions of this document are derived from
35 * software developed by the University of California, Berkeley, and its
36 * contributors.
37 */
38
39 #ifndef _SYS_VMSYSTM_H
40 #define _SYS_VMSYSTM_H
41
42 #include <sys/proc.h>
43
44 #ifdef __cplusplus
45 extern "C" {
46 #endif
47
48 /*
49 * Miscellaneous virtual memory subsystem variables and structures.
50 */
51 #ifdef _KERNEL
52 extern pgcnt_t freemem; /* remaining blocks of free memory */
53 extern pgcnt_t avefree; /* 5 sec moving average of free memory */
54 extern pgcnt_t avefree30; /* 30 sec moving average of free memory */
55 extern pgcnt_t deficit; /* estimate of needs of new swapped in procs */
56 extern pgcnt_t nscan; /* number of scans in last second */
57 extern pgcnt_t desscan; /* desired pages scanned per second */
58 extern pgcnt_t slowscan;
59 extern pgcnt_t fastscan;
60 extern pgcnt_t pushes; /* number of pages pushed to swap device */
61
62 /* writable copies of tunables */
63 extern pgcnt_t maxpgio; /* max paging i/o per sec before start swaps */
64 extern pgcnt_t lotsfree; /* max free before clock freezes */
65 extern pgcnt_t desfree; /* minimum free pages before swapping begins */
66 extern pgcnt_t minfree; /* no of pages to try to keep free via daemon */
67 extern pgcnt_t needfree; /* no of pages currently being waited for */
68 extern pgcnt_t throttlefree; /* point at which we block PG_WAIT calls */
69 extern pgcnt_t pageout_reserve; /* point at which we deny non-PG_WAIT calls */
70 extern pgcnt_t pages_before_pager; /* XXX */
71
72 /*
73 * TRUE if the pageout daemon, fsflush daemon or the scheduler. These
74 * processes can't sleep while trying to free up memory since a deadlock
75 * will occur if they do sleep.
76 */
77 #define NOMEMWAIT() (ttoproc(curthread) == proc_pageout || \
78 ttoproc(curthread) == proc_fsflush || \
79 ttoproc(curthread) == proc_sched)
80
81 /* insure non-zero */
82 #define nz(x) ((x) != 0 ? (x) : 1)
83
84 /*
85 * Flags passed by the swapper to swapout routines of each
86 * scheduling class.
87 */
88 #define HARDSWAP 1
89 #define SOFTSWAP 2
90
|
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21 /*
22 * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
24 */
25 /*
26 * Copyright 2013 Nexenta Systems, Inc. All rights reserved.
27 */
28
29 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
30 /* All Rights Reserved */
31
32 /*
33 * University Copyright- Copyright (c) 1982, 1986, 1988
34 * The Regents of the University of California
35 * All Rights Reserved
36 *
37 * University Acknowledgment- Portions of this document are derived from
38 * software developed by the University of California, Berkeley, and its
39 * contributors.
40 */
41
42 #ifndef _SYS_VMSYSTM_H
43 #define _SYS_VMSYSTM_H
44
45 #include <sys/proc.h>
46
47 #ifdef __cplusplus
48 extern "C" {
49 #endif
50
51 /*
52 * Miscellaneous virtual memory subsystem variables and structures.
53 */
54 #ifdef _KERNEL
55 extern pgcnt_t freemem; /* remaining blocks of free memory */
56 extern pgcnt_t avefree; /* 5 sec moving average of free memory */
57 extern pgcnt_t avefree30; /* 30 sec moving average of free memory */
58 extern pgcnt_t deficit; /* estimate of needs of new swapped in procs */
59 extern pgcnt_t nscan; /* number of scans in last second */
60 extern pgcnt_t desscan; /* desired pages scanned per second */
61 extern volatile pgcnt_t slowscan;
62 extern volatile pgcnt_t fastscan;
63 extern pgcnt_t pushes; /* number of pages pushed to swap device */
64
65 /* writable copies of tunables */
66 extern volatile pgcnt_t maxpgio; /* max paging i/o per sec before */
67 /* start swaps */
68 extern volatile pgcnt_t lotsfree; /* max free before clock freezes */
69 extern volatile pgcnt_t desfree; /* minimum free pages before swapping */
70 /* begins */
71 extern volatile pgcnt_t minfree; /* no of pages to try to keep free */
72 /* via daemon */
73 extern pgcnt_t needfree; /* no of pages currently being waited for */
74 extern volatile pgcnt_t throttlefree; /* point at which we block PG_WAIT */
75 /* calls */
76 extern volatile pgcnt_t pageout_reserve; /* point at which we deny */
77 /* non-PG_WAIT calls */
78 extern volatile pgcnt_t pages_before_pager; /* XXX */
79
80 /*
81 * TRUE if the pageout daemon, fsflush daemon or the scheduler. These
82 * processes can't sleep while trying to free up memory since a deadlock
83 * will occur if they do sleep.
84 */
85 #define NOMEMWAIT() (ttoproc(curthread) == proc_pageout || \
86 ttoproc(curthread) == proc_fsflush || \
87 ttoproc(curthread) == proc_sched)
88
89 /* insure non-zero */
90 #define nz(x) ((x) != 0 ? (x) : 1)
91
92 /*
93 * Flags passed by the swapper to swapout routines of each
94 * scheduling class.
95 */
96 #define HARDSWAP 1
97 #define SOFTSWAP 2
98
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