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5513 KM_NORMALPRI should be documented in kmem_alloc(9f) and kmem_cache_create(9f) man pages
14465 Present KM_NOSLEEP_LAZY as documented interface
Change-Id: I002ec28ddf390650f1fcba1ca94f6abfdb241439
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--- old/usr/src/uts/common/sys/kmem.h
+++ new/usr/src/uts/common/sys/kmem.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.
15 15 * If applicable, add the following below this CDDL HEADER, with the
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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 /*
23 23 * Copyright (c) 1988, 2010, Oracle and/or its affiliates. All rights reserved.
24 24 * Copyright (c) 2012 by Delphix. All rights reserved.
25 25 * Copyright 2013 Nexenta Systems, Inc. All rights reserved.
26 - * Copyright 2018, Joyent, Inc.
26 + * Copyright 2022 Joyent, Inc.
27 27 */
28 28
29 29 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
30 30 /* All Rights Reserved */
31 31
32 32 #ifndef _SYS_KMEM_H
33 33 #define _SYS_KMEM_H
34 34
35 35 #include <sys/types.h>
36 36 #include <sys/vmem.h>
37 37
38 38 #ifdef __cplusplus
39 39 extern "C" {
40 40 #endif
41 41
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42 42 /*
43 43 * Kernel memory allocator: DDI interfaces.
44 44 * See kmem_alloc(9F) for details.
45 45 */
46 46
47 47 #define KM_SLEEP 0x0000 /* can block for memory; success guaranteed */
48 48 #define KM_NOSLEEP 0x0001 /* cannot block for memory; may fail */
49 49 #define KM_PANIC 0x0002 /* if memory cannot be allocated, panic */
50 50 #define KM_PUSHPAGE 0x0004 /* can block for memory; may use reserve */
51 51 #define KM_NORMALPRI 0x0008 /* with KM_NOSLEEP, lower priority allocation */
52 +#define KM_NOSLEEP_LAZY (KM_NOSLEEP | KM_NORMALPRI) /* Syntactic sugar. */
52 53 #define KM_VMFLAGS 0x00ff /* flags that must match VM_* flags */
53 54
54 55 #define KM_FLAGS 0xffff /* all settable kmem flags */
55 56
56 57 #if defined(_KERNEL) || defined(_FAKE_KERNEL)
57 58
58 59 extern void *kmem_alloc(size_t size, int kmflags);
59 60 extern void *kmem_zalloc(size_t size, int kmflags);
60 61 extern void kmem_free(void *buf, size_t size);
61 62 extern void *kmem_alloc_tryhard(size_t size, size_t *alloc_size, int kmflags);
62 63 extern void kmem_dump_init(size_t);
63 64 extern void kmem_dump_begin(void);
64 65 extern size_t kmem_dump_finish(char *buf, size_t size);
65 66
66 67 #endif /* _KERNEL */
67 68
68 69 /*
69 70 * Kernel memory allocator: private interfaces.
70 71 * These interfaces are still evolving.
71 72 * Do not use them in unbundled drivers.
72 73 */
73 74
74 75 /*
75 76 * Flags for kmem_cache_create()
76 77 */
77 78 #define KMC_NOTOUCH 0x00010000
78 79 #define KMC_NODEBUG 0x00020000
79 80 #define KMC_NOMAGAZINE 0x00040000
80 81 #define KMC_NOHASH 0x00080000
81 82 #define KMC_QCACHE 0x00100000
82 83 #define KMC_KMEM_ALLOC 0x00200000 /* internal use only */
83 84 #define KMC_IDENTIFIER 0x00400000 /* internal use only */
84 85 #define KMC_PREFILL 0x00800000
85 86
86 87 struct kmem_cache; /* cache structure is opaque to kmem clients */
87 88
88 89 typedef struct kmem_cache kmem_cache_t;
89 90
90 91 /* Client response to kmem move callback */
91 92 typedef enum kmem_cbrc {
92 93 KMEM_CBRC_YES,
93 94 KMEM_CBRC_NO,
94 95 KMEM_CBRC_LATER,
95 96 KMEM_CBRC_DONT_NEED,
96 97 KMEM_CBRC_DONT_KNOW
97 98 } kmem_cbrc_t;
98 99
99 100 #if defined(_KERNEL) || defined(_FAKE_KERNEL)
100 101
101 102 /*
102 103 * Helps clients implementing the move() callback to recognize known objects by
103 104 * testing a client-designated pointer member. Takes advantage of the fact that
104 105 * any scribbling to freed memory done by kmem is guaranteed to set one of the
105 106 * two low order bits.
106 107 */
107 108 #define POINTER_IS_VALID(p) (!((uintptr_t)(p) & 0x3))
108 109 #define POINTER_INVALIDATE(pp) (*(pp) = (void *)((uintptr_t)(*(pp)) | 0x1))
109 110
110 111 extern int kmem_ready;
111 112 extern pgcnt_t kmem_reapahead;
112 113 extern size_t kmem_max_cached;
113 114
114 115 extern void kmem_init(void);
115 116 extern void kmem_thread_init(void);
116 117 extern void kmem_mp_init(void);
117 118 extern void kmem_reap(void);
118 119 extern void kmem_reap_idspace(void);
119 120 extern int kmem_debugging(void);
120 121 extern size_t kmem_avail(void);
121 122 extern size_t kmem_maxavail(void);
122 123
123 124 extern kmem_cache_t *kmem_cache_create(char *, size_t, size_t,
124 125 int (*)(void *, void *, int), void (*)(void *, void *),
125 126 void (*)(void *), void *, vmem_t *, int);
126 127 extern void kmem_cache_set_move(kmem_cache_t *,
127 128 kmem_cbrc_t (*)(void *, void *, size_t, void *));
128 129 extern void kmem_cache_destroy(kmem_cache_t *);
129 130 extern void *kmem_cache_alloc(kmem_cache_t *, int);
130 131 extern void kmem_cache_free(kmem_cache_t *, void *);
131 132 extern uint64_t kmem_cache_stat(kmem_cache_t *, char *);
132 133 extern boolean_t kmem_cache_reap_active(void);
133 134 extern void kmem_cache_reap_soon(kmem_cache_t *);
134 135 extern void kmem_cache_move_notify(kmem_cache_t *, void *);
135 136
136 137 #endif /* _KERNEL */
137 138
138 139 #ifdef __cplusplus
139 140 }
140 141 #endif
141 142
142 143 #endif /* _SYS_KMEM_H */
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