]>
Commit | Line | Data |
---|---|---|
10946b02 AX |
1 | /* |
2 | * Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC. | |
3 | * Copyright (C) 2007 The Regents of the University of California. | |
4 | * Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER). | |
5 | * Written by Brian Behlendorf <behlendorf1@llnl.gov>. | |
6 | * UCRL-CODE-235197 | |
7 | * | |
8 | * This file is part of the SPL, Solaris Porting Layer. | |
9 | * For details, see <http://zfsonlinux.org/>. | |
10 | * | |
11 | * The SPL is free software; you can redistribute it and/or modify it | |
12 | * under the terms of the GNU General Public License as published by the | |
13 | * Free Software Foundation; either version 2 of the License, or (at your | |
14 | * option) any later version. | |
15 | * | |
16 | * The SPL is distributed in the hope that it will be useful, but WITHOUT | |
17 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
18 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
19 | * for more details. | |
20 | * | |
21 | * You should have received a copy of the GNU General Public License along | |
22 | * with the SPL. If not, see <http://www.gnu.org/licenses/>. | |
23 | */ | |
24 | ||
25 | #include <sys/debug.h> | |
26 | #include <sys/vmem.h> | |
ec06701b | 27 | #include <sys/kmem_cache.h> |
10946b02 AX |
28 | #include <linux/mm_compat.h> |
29 | #include <linux/module.h> | |
30 | ||
31 | vmem_t *heap_arena = NULL; | |
32 | EXPORT_SYMBOL(heap_arena); | |
33 | ||
34 | vmem_t *zio_alloc_arena = NULL; | |
35 | EXPORT_SYMBOL(zio_alloc_arena); | |
36 | ||
37 | vmem_t *zio_arena = NULL; | |
38 | EXPORT_SYMBOL(zio_arena); | |
39 | ||
ec06701b AX |
40 | #define VMEM_FLOOR_SIZE (4 * 1024 * 1024) /* 4MB floor */ |
41 | ||
42 | /* | |
43 | * Return approximate virtual memory usage based on these assumptions: | |
44 | * | |
45 | * 1) The major SPL consumer of virtual memory is the kmem cache. | |
46 | * 2) Memory allocated with vmem_alloc() is short lived and can be ignored. | |
47 | * 3) Allow a 4MB floor as a generous pad given normal consumption. | |
48 | * 4) The spl_kmem_cache_sem only contends with cache create/destroy. | |
49 | */ | |
10946b02 AX |
50 | size_t |
51 | vmem_size(vmem_t *vmp, int typemask) | |
52 | { | |
ec06701b AX |
53 | spl_kmem_cache_t *skc; |
54 | size_t alloc = VMEM_FLOOR_SIZE; | |
55 | ||
56 | if ((typemask & VMEM_ALLOC) && (typemask & VMEM_FREE)) | |
57 | return (VMALLOC_TOTAL); | |
58 | ||
59 | ||
60 | down_read(&spl_kmem_cache_sem); | |
61 | list_for_each_entry(skc, &spl_kmem_cache_list, skc_list) { | |
62 | if (skc->skc_flags & KMC_VMEM) | |
63 | alloc += skc->skc_slab_size * skc->skc_slab_total; | |
64 | } | |
65 | up_read(&spl_kmem_cache_sem); | |
10946b02 | 66 | |
ec06701b AX |
67 | if (typemask & VMEM_ALLOC) |
68 | return (MIN(alloc, VMALLOC_TOTAL)); | |
69 | else if (typemask & VMEM_FREE) | |
70 | return (MAX(VMALLOC_TOTAL - alloc, 0)); | |
71 | else | |
72 | return (0); | |
10946b02 AX |
73 | } |
74 | EXPORT_SYMBOL(vmem_size); | |
75 | ||
76 | /* | |
77 | * Public vmem_alloc(), vmem_zalloc() and vmem_free() interfaces. | |
78 | */ | |
79 | void * | |
80 | spl_vmem_alloc(size_t size, int flags, const char *func, int line) | |
81 | { | |
82 | ASSERT0(flags & ~KM_PUBLIC_MASK); | |
83 | ||
84 | flags |= KM_VMEM; | |
85 | ||
86 | #if !defined(DEBUG_KMEM) | |
87 | return (spl_kmem_alloc_impl(size, flags, NUMA_NO_NODE)); | |
88 | #elif !defined(DEBUG_KMEM_TRACKING) | |
89 | return (spl_kmem_alloc_debug(size, flags, NUMA_NO_NODE)); | |
90 | #else | |
91 | return (spl_kmem_alloc_track(size, flags, func, line, NUMA_NO_NODE)); | |
92 | #endif | |
93 | } | |
94 | EXPORT_SYMBOL(spl_vmem_alloc); | |
95 | ||
96 | void * | |
97 | spl_vmem_zalloc(size_t size, int flags, const char *func, int line) | |
98 | { | |
99 | ASSERT0(flags & ~KM_PUBLIC_MASK); | |
100 | ||
101 | flags |= (KM_VMEM | KM_ZERO); | |
102 | ||
103 | #if !defined(DEBUG_KMEM) | |
104 | return (spl_kmem_alloc_impl(size, flags, NUMA_NO_NODE)); | |
105 | #elif !defined(DEBUG_KMEM_TRACKING) | |
106 | return (spl_kmem_alloc_debug(size, flags, NUMA_NO_NODE)); | |
107 | #else | |
108 | return (spl_kmem_alloc_track(size, flags, func, line, NUMA_NO_NODE)); | |
109 | #endif | |
110 | } | |
111 | EXPORT_SYMBOL(spl_vmem_zalloc); | |
112 | ||
113 | void | |
114 | spl_vmem_free(const void *buf, size_t size) | |
115 | { | |
116 | #if !defined(DEBUG_KMEM) | |
117 | return (spl_kmem_free_impl(buf, size)); | |
118 | #elif !defined(DEBUG_KMEM_TRACKING) | |
119 | return (spl_kmem_free_debug(buf, size)); | |
120 | #else | |
121 | return (spl_kmem_free_track(buf, size)); | |
122 | #endif | |
123 | } | |
124 | EXPORT_SYMBOL(spl_vmem_free); | |
125 | ||
10946b02 AX |
126 | int |
127 | spl_vmem_init(void) | |
128 | { | |
129 | return (0); | |
130 | } | |
131 | ||
132 | void | |
133 | spl_vmem_fini(void) | |
134 | { | |
135 | } |