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OS-6363 system went to dark side of moon for ~467 seconds OS-6404 ARC reclaim should throttle its calls to arc_kmem_reap_now() Reviewed by: Bryan Cantrill <bryan@joyent.com> Reviewed by: Dan McDonald <danmcd@joyent.com>
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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 (c) 2017, Joyent, Inc.
26 27 */
27 28
28 29 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
29 30 /* All Rights Reserved */
30 31
31 32 #ifndef _SYS_KMEM_H
32 33 #define _SYS_KMEM_H
33 34
34 35 #include <sys/types.h>
35 36 #include <sys/vmem.h>
36 37
37 38 #ifdef __cplusplus
38 39 extern "C" {
39 40 #endif
40 41
41 42 /*
42 43 * Kernel memory allocator: DDI interfaces.
43 44 * See kmem_alloc(9F) for details.
44 45 */
45 46
46 47 #define KM_SLEEP 0x0000 /* can block for memory; success guaranteed */
47 48 #define KM_NOSLEEP 0x0001 /* cannot block for memory; may fail */
48 49 #define KM_PANIC 0x0002 /* if memory cannot be allocated, panic */
49 50 #define KM_PUSHPAGE 0x0004 /* can block for memory; may use reserve */
50 51 #define KM_NORMALPRI 0x0008 /* with KM_NOSLEEP, lower priority allocation */
51 52 #define KM_VMFLAGS 0x00ff /* flags that must match VM_* flags */
52 53
53 54 #define KM_FLAGS 0xffff /* all settable kmem flags */
54 55
55 56 #if defined(_KERNEL) || defined(_FAKE_KERNEL)
56 57
57 58 extern void *kmem_alloc(size_t size, int kmflags);
58 59 extern void *kmem_zalloc(size_t size, int kmflags);
59 60 extern void kmem_free(void *buf, size_t size);
60 61 extern void *kmem_alloc_tryhard(size_t size, size_t *alloc_size, int kmflags);
61 62 extern void kmem_dump_init(size_t);
62 63 extern void kmem_dump_begin(void);
63 64 extern size_t kmem_dump_finish(char *buf, size_t size);
64 65
65 66 #endif /* _KERNEL */
66 67
67 68 /*
68 69 * Kernel memory allocator: private interfaces.
69 70 * These interfaces are still evolving.
70 71 * Do not use them in unbundled drivers.
71 72 */
72 73
73 74 /*
74 75 * Flags for kmem_cache_create()
75 76 */
76 77 #define KMC_NOTOUCH 0x00010000
77 78 #define KMC_NODEBUG 0x00020000
78 79 #define KMC_NOMAGAZINE 0x00040000
79 80 #define KMC_NOHASH 0x00080000
80 81 #define KMC_QCACHE 0x00100000
81 82 #define KMC_KMEM_ALLOC 0x00200000 /* internal use only */
82 83 #define KMC_IDENTIFIER 0x00400000 /* internal use only */
83 84 #define KMC_PREFILL 0x00800000
84 85
85 86 struct kmem_cache; /* cache structure is opaque to kmem clients */
86 87
87 88 typedef struct kmem_cache kmem_cache_t;
88 89
89 90 /* Client response to kmem move callback */
90 91 typedef enum kmem_cbrc {
91 92 KMEM_CBRC_YES,
92 93 KMEM_CBRC_NO,
93 94 KMEM_CBRC_LATER,
94 95 KMEM_CBRC_DONT_NEED,
95 96 KMEM_CBRC_DONT_KNOW
96 97 } kmem_cbrc_t;
97 98
98 99 #if defined(_KERNEL) || defined(_FAKE_KERNEL)
99 100
100 101 /*
101 102 * Helps clients implementing the move() callback to recognize known objects by
102 103 * testing a client-designated pointer member. Takes advantage of the fact that
103 104 * any scribbling to freed memory done by kmem is guaranteed to set one of the
104 105 * two low order bits.
105 106 */
106 107 #define POINTER_IS_VALID(p) (!((uintptr_t)(p) & 0x3))
107 108 #define POINTER_INVALIDATE(pp) (*(pp) = (void *)((uintptr_t)(*(pp)) | 0x1))
108 109
109 110 extern int kmem_ready;
110 111 extern pgcnt_t kmem_reapahead;
111 112 extern size_t kmem_max_cached;
112 113
113 114 extern void kmem_init(void);
114 115 extern void kmem_thread_init(void);
115 116 extern void kmem_mp_init(void);
116 117 extern void kmem_reap(void);
117 118 extern void kmem_reap_idspace(void);
118 119 extern int kmem_debugging(void);
119 120 extern size_t kmem_avail(void);
120 121 extern size_t kmem_maxavail(void);
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121 122
122 123 extern kmem_cache_t *kmem_cache_create(char *, size_t, size_t,
123 124 int (*)(void *, void *, int), void (*)(void *, void *),
124 125 void (*)(void *), void *, vmem_t *, int);
125 126 extern void kmem_cache_set_move(kmem_cache_t *,
126 127 kmem_cbrc_t (*)(void *, void *, size_t, void *));
127 128 extern void kmem_cache_destroy(kmem_cache_t *);
128 129 extern void *kmem_cache_alloc(kmem_cache_t *, int);
129 130 extern void kmem_cache_free(kmem_cache_t *, void *);
130 131 extern uint64_t kmem_cache_stat(kmem_cache_t *, char *);
131 -extern void kmem_cache_reap_now(kmem_cache_t *);
132 +extern boolean_t kmem_cache_reap_active(void);
133 +extern void kmem_cache_reap_soon(kmem_cache_t *);
132 134 extern void kmem_cache_move_notify(kmem_cache_t *, void *);
133 135
134 136 #endif /* _KERNEL */
135 137
136 138 #ifdef __cplusplus
137 139 }
138 140 #endif
139 141
140 142 #endif /* _SYS_KMEM_H */
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