Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
7b718769 NS |
2 | * Copyright (c) 2000-2005 Silicon Graphics, Inc. |
3 | * All Rights Reserved. | |
1da177e4 | 4 | * |
7b718769 NS |
5 | * This program is free software; you can redistribute it and/or |
6 | * modify it under the terms of the GNU General Public License as | |
1da177e4 LT |
7 | * published by the Free Software Foundation. |
8 | * | |
7b718769 NS |
9 | * This program is distributed in the hope that it would be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
1da177e4 | 13 | * |
7b718769 NS |
14 | * You should have received a copy of the GNU General Public License |
15 | * along with this program; if not, write the Free Software Foundation, | |
16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
1da177e4 | 17 | */ |
1da177e4 | 18 | #include <linux/mm.h> |
1da177e4 | 19 | #include <linux/highmem.h> |
5a0e3ad6 | 20 | #include <linux/slab.h> |
1da177e4 LT |
21 | #include <linux/swap.h> |
22 | #include <linux/blkdev.h> | |
3fcfab16 | 23 | #include <linux/backing-dev.h> |
1da177e4 LT |
24 | #include "time.h" |
25 | #include "kmem.h" | |
4f10700a | 26 | #include "xfs_message.h" |
1da177e4 | 27 | |
bdfb0430 CH |
28 | /* |
29 | * Greedy allocation. May fail and may return vmalloced memory. | |
bdfb0430 CH |
30 | */ |
31 | void * | |
32 | kmem_zalloc_greedy(size_t *size, size_t minsize, size_t maxsize) | |
33 | { | |
34 | void *ptr; | |
35 | size_t kmsize = maxsize; | |
36 | ||
fdd3ccee | 37 | while (!(ptr = vzalloc(kmsize))) { |
bdfb0430 CH |
38 | if ((kmsize >>= 1) <= minsize) |
39 | kmsize = minsize; | |
40 | } | |
41 | if (ptr) | |
42 | *size = kmsize; | |
43 | return ptr; | |
44 | } | |
1da177e4 | 45 | |
1da177e4 | 46 | void * |
77ba7877 | 47 | kmem_alloc(size_t size, xfs_km_flags_t flags) |
1da177e4 | 48 | { |
27496a8c AV |
49 | int retries = 0; |
50 | gfp_t lflags = kmem_flags_convert(flags); | |
51 | void *ptr; | |
1da177e4 LT |
52 | |
53 | do { | |
bdfb0430 | 54 | ptr = kmalloc(size, lflags); |
1da177e4 LT |
55 | if (ptr || (flags & (KM_MAYFAIL|KM_NOSLEEP))) |
56 | return ptr; | |
57 | if (!(++retries % 100)) | |
4f10700a DC |
58 | xfs_err(NULL, |
59 | "possible memory allocation deadlock in %s (mode:0x%x)", | |
34a622b2 | 60 | __func__, lflags); |
8aa7e847 | 61 | congestion_wait(BLK_RW_ASYNC, HZ/50); |
1da177e4 LT |
62 | } while (1); |
63 | } | |
64 | ||
65 | void * | |
77ba7877 | 66 | kmem_zalloc(size_t size, xfs_km_flags_t flags) |
1da177e4 LT |
67 | { |
68 | void *ptr; | |
69 | ||
70 | ptr = kmem_alloc(size, flags); | |
71 | if (ptr) | |
72 | memset((char *)ptr, 0, (int)size); | |
73 | return ptr; | |
74 | } | |
75 | ||
fdd3ccee DC |
76 | void * |
77 | kmem_zalloc_large(size_t size, xfs_km_flags_t flags) | |
78 | { | |
79 | void *ptr; | |
80 | ||
81 | ptr = kmem_zalloc(size, flags | KM_MAYFAIL); | |
82 | if (ptr) | |
83 | return ptr; | |
84 | return vzalloc(size); | |
85 | } | |
86 | ||
1da177e4 | 87 | void |
d3689d76 | 88 | kmem_free(const void *ptr) |
1da177e4 | 89 | { |
9e2779fa | 90 | if (!is_vmalloc_addr(ptr)) { |
1da177e4 LT |
91 | kfree(ptr); |
92 | } else { | |
93 | vfree(ptr); | |
94 | } | |
95 | } | |
96 | ||
97 | void * | |
d3689d76 | 98 | kmem_realloc(const void *ptr, size_t newsize, size_t oldsize, |
77ba7877 | 99 | xfs_km_flags_t flags) |
1da177e4 LT |
100 | { |
101 | void *new; | |
102 | ||
103 | new = kmem_alloc(newsize, flags); | |
104 | if (ptr) { | |
105 | if (new) | |
106 | memcpy(new, ptr, | |
107 | ((oldsize < newsize) ? oldsize : newsize)); | |
f0e2d93c | 108 | kmem_free(ptr); |
1da177e4 LT |
109 | } |
110 | return new; | |
111 | } | |
112 | ||
113 | void * | |
77ba7877 | 114 | kmem_zone_alloc(kmem_zone_t *zone, xfs_km_flags_t flags) |
1da177e4 | 115 | { |
27496a8c AV |
116 | int retries = 0; |
117 | gfp_t lflags = kmem_flags_convert(flags); | |
118 | void *ptr; | |
1da177e4 LT |
119 | |
120 | do { | |
121 | ptr = kmem_cache_alloc(zone, lflags); | |
122 | if (ptr || (flags & (KM_MAYFAIL|KM_NOSLEEP))) | |
123 | return ptr; | |
124 | if (!(++retries % 100)) | |
4f10700a DC |
125 | xfs_err(NULL, |
126 | "possible memory allocation deadlock in %s (mode:0x%x)", | |
34a622b2 | 127 | __func__, lflags); |
8aa7e847 | 128 | congestion_wait(BLK_RW_ASYNC, HZ/50); |
1da177e4 LT |
129 | } while (1); |
130 | } | |
131 | ||
132 | void * | |
77ba7877 | 133 | kmem_zone_zalloc(kmem_zone_t *zone, xfs_km_flags_t flags) |
1da177e4 LT |
134 | { |
135 | void *ptr; | |
136 | ||
137 | ptr = kmem_zone_alloc(zone, flags); | |
138 | if (ptr) | |
139 | memset((char *)ptr, 0, kmem_cache_size(zone)); | |
140 | return ptr; | |
141 | } |