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re #13613 rb4516 Tunables needs volatile keyword
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--- old/usr/src/uts/common/sys/vmsystm.h
+++ new/usr/src/uts/common/sys/vmsystm.h
1 1 /*
2 2 * CDDL HEADER START
3 3 *
4 4 * The contents of this file are subject to the terms of the
5 5 * Common Development and Distribution License (the "License").
6 6 * You may not use this file except in compliance with the License.
7 7 *
8 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 9 * or http://www.opensolaris.org/os/licensing.
10 10 * See the License for the specific language governing permissions
11 11 * and limitations under the License.
12 12 *
13 13 * When distributing Covered Code, include this CDDL HEADER in each
14 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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15 15 * If applicable, add the following below this CDDL HEADER, with the
16 16 * fields enclosed by brackets "[]" replaced with your own identifying
17 17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 18 *
19 19 * CDDL HEADER END
20 20 */
21 21 /*
22 22 * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
23 23 * Use is subject to license terms.
24 24 */
25 +/*
26 + * Copyright 2013 Nexenta Systems, Inc. All rights reserved.
27 + */
25 28
26 29 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
27 30 /* All Rights Reserved */
28 31
29 32 /*
30 33 * University Copyright- Copyright (c) 1982, 1986, 1988
31 34 * The Regents of the University of California
32 35 * All Rights Reserved
33 36 *
34 37 * University Acknowledgment- Portions of this document are derived from
35 38 * software developed by the University of California, Berkeley, and its
36 39 * contributors.
37 40 */
38 41
39 42 #ifndef _SYS_VMSYSTM_H
40 43 #define _SYS_VMSYSTM_H
41 44
42 45 #include <sys/proc.h>
43 46
44 47 #ifdef __cplusplus
45 48 extern "C" {
46 49 #endif
47 50
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48 51 /*
49 52 * Miscellaneous virtual memory subsystem variables and structures.
50 53 */
51 54 #ifdef _KERNEL
52 55 extern pgcnt_t freemem; /* remaining blocks of free memory */
53 56 extern pgcnt_t avefree; /* 5 sec moving average of free memory */
54 57 extern pgcnt_t avefree30; /* 30 sec moving average of free memory */
55 58 extern pgcnt_t deficit; /* estimate of needs of new swapped in procs */
56 59 extern pgcnt_t nscan; /* number of scans in last second */
57 60 extern pgcnt_t desscan; /* desired pages scanned per second */
58 -extern pgcnt_t slowscan;
59 -extern pgcnt_t fastscan;
61 +extern volatile pgcnt_t slowscan;
62 +extern volatile pgcnt_t fastscan;
60 63 extern pgcnt_t pushes; /* number of pages pushed to swap device */
61 64
62 65 /* 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 */
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 */
67 73 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 */
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 */
71 79
72 80 /*
73 81 * TRUE if the pageout daemon, fsflush daemon or the scheduler. These
74 82 * processes can't sleep while trying to free up memory since a deadlock
75 83 * will occur if they do sleep.
76 84 */
77 85 #define NOMEMWAIT() (ttoproc(curthread) == proc_pageout || \
78 86 ttoproc(curthread) == proc_fsflush || \
79 87 ttoproc(curthread) == proc_sched)
80 88
81 89 /* insure non-zero */
82 90 #define nz(x) ((x) != 0 ? (x) : 1)
83 91
84 92 /*
85 93 * Flags passed by the swapper to swapout routines of each
86 94 * scheduling class.
87 95 */
88 96 #define HARDSWAP 1
89 97 #define SOFTSWAP 2
90 98
91 99 /*
92 100 * Values returned by valid_usr_range()
93 101 */
94 102 #define RANGE_OKAY (0)
95 103 #define RANGE_BADADDR (1)
96 104 #define RANGE_BADPROT (2)
97 105
98 106 /*
99 107 * map_pgsz: temporary - subject to change.
100 108 */
101 109 #define MAPPGSZ_VA 0x01
102 110 #define MAPPGSZ_STK 0x02
103 111 #define MAPPGSZ_HEAP 0x04
104 112 #define MAPPGSZ_ISM 0x08
105 113
106 114 /*
107 115 * Flags for map_pgszcvec
108 116 */
109 117 #define MAPPGSZC_SHM 0x01
110 118 #define MAPPGSZC_PRIVM 0x02
111 119 #define MAPPGSZC_STACK 0x04
112 120 #define MAPPGSZC_HEAP 0x08
113 121
114 122 /*
115 123 * vacalign values for choose_addr
116 124 */
117 125 #define ADDR_NOVACALIGN 0
118 126 #define ADDR_VACALIGN 1
119 127
120 128 struct as;
121 129 struct page;
122 130 struct anon;
123 131
124 132 extern int maxslp;
125 133 extern ulong_t pginrate;
126 134 extern ulong_t pgoutrate;
127 135 extern void swapout_lwp(klwp_t *);
128 136
129 137 extern int valid_va_range(caddr_t *basep, size_t *lenp, size_t minlen,
130 138 int dir);
131 139 extern int valid_va_range_aligned(caddr_t *basep, size_t *lenp,
132 140 size_t minlen, int dir, size_t align, size_t redzone, size_t off);
133 141
134 142 extern int valid_usr_range(caddr_t, size_t, uint_t, struct as *, caddr_t);
135 143 extern int useracc(void *, size_t, int);
136 144 extern size_t map_pgsz(int maptype, struct proc *p, caddr_t addr, size_t len,
137 145 int memcntl);
138 146 extern uint_t map_pgszcvec(caddr_t addr, size_t size, uintptr_t off, int flags,
139 147 int type, int memcntl);
140 148 extern int choose_addr(struct as *as, caddr_t *addrp, size_t len, offset_t off,
141 149 int vacalign, uint_t flags);
142 150 extern void map_addr(caddr_t *addrp, size_t len, offset_t off, int vacalign,
143 151 uint_t flags);
144 152 extern int map_addr_vacalign_check(caddr_t, u_offset_t);
145 153 extern void map_addr_proc(caddr_t *addrp, size_t len, offset_t off,
146 154 int vacalign, caddr_t userlimit, struct proc *p, uint_t flags);
147 155 extern void vmmeter(void);
148 156 extern int cow_mapin(struct as *, caddr_t, caddr_t, struct page **,
149 157 struct anon **, size_t *, int);
150 158
151 159 extern caddr_t ppmapin(struct page *, uint_t, caddr_t);
152 160 extern void ppmapout(caddr_t);
153 161
154 162 extern int pf_is_memory(pfn_t);
155 163
156 164 extern void dcache_flushall(void);
157 165
158 166 extern void *boot_virt_alloc(void *addr, size_t size);
159 167
160 168 extern size_t exec_get_spslew(void);
161 169
162 170 #endif /* _KERNEL */
163 171
164 172 #ifdef __cplusplus
165 173 }
166 174 #endif
167 175
168 176 #endif /* _SYS_VMSYSTM_H */
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