Commit | Line | Data |
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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 LT |
18 | #include <linux/sched.h> |
19 | #include <linux/mm.h> | |
20 | #include <linux/vmalloc.h> | |
21 | #include <linux/highmem.h> | |
22 | #include <linux/swap.h> | |
23 | #include <linux/blkdev.h> | |
1da177e4 LT |
24 | #include "time.h" |
25 | #include "kmem.h" | |
26 | ||
27 | #define MAX_VMALLOCS 6 | |
28 | #define MAX_SLAB_SIZE 0x20000 | |
29 | ||
1da177e4 | 30 | void * |
27496a8c | 31 | kmem_alloc(size_t size, unsigned int __nocast flags) |
1da177e4 | 32 | { |
27496a8c AV |
33 | int retries = 0; |
34 | gfp_t lflags = kmem_flags_convert(flags); | |
35 | void *ptr; | |
1da177e4 | 36 | |
efb8ad7e NS |
37 | #ifdef DEBUG |
38 | if (unlikely(!(flags & KM_LARGE) && (size > PAGE_SIZE))) { | |
39 | printk(KERN_WARNING "Large %s attempt, size=%ld\n", | |
40 | __FUNCTION__, (long)size); | |
41 | dump_stack(); | |
42 | } | |
43 | #endif | |
44 | ||
1da177e4 LT |
45 | do { |
46 | if (size < MAX_SLAB_SIZE || retries > MAX_VMALLOCS) | |
47 | ptr = kmalloc(size, lflags); | |
48 | else | |
49 | ptr = __vmalloc(size, lflags, PAGE_KERNEL); | |
50 | if (ptr || (flags & (KM_MAYFAIL|KM_NOSLEEP))) | |
51 | return ptr; | |
52 | if (!(++retries % 100)) | |
53 | printk(KERN_ERR "XFS: possible memory allocation " | |
54 | "deadlock in %s (mode:0x%x)\n", | |
55 | __FUNCTION__, lflags); | |
56 | blk_congestion_wait(WRITE, HZ/50); | |
57 | } while (1); | |
58 | } | |
59 | ||
60 | void * | |
27496a8c | 61 | kmem_zalloc(size_t size, unsigned int __nocast flags) |
1da177e4 LT |
62 | { |
63 | void *ptr; | |
64 | ||
65 | ptr = kmem_alloc(size, flags); | |
66 | if (ptr) | |
67 | memset((char *)ptr, 0, (int)size); | |
68 | return ptr; | |
69 | } | |
70 | ||
71 | void | |
72 | kmem_free(void *ptr, size_t size) | |
73 | { | |
74 | if (((unsigned long)ptr < VMALLOC_START) || | |
75 | ((unsigned long)ptr >= VMALLOC_END)) { | |
76 | kfree(ptr); | |
77 | } else { | |
78 | vfree(ptr); | |
79 | } | |
80 | } | |
81 | ||
82 | void * | |
760dea67 | 83 | kmem_realloc(void *ptr, size_t newsize, size_t oldsize, |
27496a8c | 84 | unsigned int __nocast flags) |
1da177e4 LT |
85 | { |
86 | void *new; | |
87 | ||
88 | new = kmem_alloc(newsize, flags); | |
89 | if (ptr) { | |
90 | if (new) | |
91 | memcpy(new, ptr, | |
92 | ((oldsize < newsize) ? oldsize : newsize)); | |
93 | kmem_free(ptr, oldsize); | |
94 | } | |
95 | return new; | |
96 | } | |
97 | ||
98 | void * | |
27496a8c | 99 | kmem_zone_alloc(kmem_zone_t *zone, unsigned int __nocast flags) |
1da177e4 | 100 | { |
27496a8c AV |
101 | int retries = 0; |
102 | gfp_t lflags = kmem_flags_convert(flags); | |
103 | void *ptr; | |
1da177e4 LT |
104 | |
105 | do { | |
106 | ptr = kmem_cache_alloc(zone, lflags); | |
107 | if (ptr || (flags & (KM_MAYFAIL|KM_NOSLEEP))) | |
108 | return ptr; | |
109 | if (!(++retries % 100)) | |
110 | printk(KERN_ERR "XFS: possible memory allocation " | |
111 | "deadlock in %s (mode:0x%x)\n", | |
112 | __FUNCTION__, lflags); | |
113 | blk_congestion_wait(WRITE, HZ/50); | |
114 | } while (1); | |
115 | } | |
116 | ||
117 | void * | |
27496a8c | 118 | kmem_zone_zalloc(kmem_zone_t *zone, unsigned int __nocast flags) |
1da177e4 LT |
119 | { |
120 | void *ptr; | |
121 | ||
122 | ptr = kmem_zone_alloc(zone, flags); | |
123 | if (ptr) | |
124 | memset((char *)ptr, 0, kmem_cache_size(zone)); | |
125 | return ptr; | |
126 | } |