]>
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 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 | ||
30 | ||
31 | void * | |
27496a8c | 32 | kmem_alloc(size_t size, unsigned int __nocast flags) |
1da177e4 | 33 | { |
27496a8c AV |
34 | int retries = 0; |
35 | gfp_t lflags = kmem_flags_convert(flags); | |
36 | void *ptr; | |
1da177e4 LT |
37 | |
38 | do { | |
39 | if (size < MAX_SLAB_SIZE || retries > MAX_VMALLOCS) | |
40 | ptr = kmalloc(size, lflags); | |
41 | else | |
42 | ptr = __vmalloc(size, lflags, PAGE_KERNEL); | |
43 | if (ptr || (flags & (KM_MAYFAIL|KM_NOSLEEP))) | |
44 | return ptr; | |
45 | if (!(++retries % 100)) | |
46 | printk(KERN_ERR "XFS: possible memory allocation " | |
47 | "deadlock in %s (mode:0x%x)\n", | |
48 | __FUNCTION__, lflags); | |
49 | blk_congestion_wait(WRITE, HZ/50); | |
50 | } while (1); | |
51 | } | |
52 | ||
53 | void * | |
27496a8c | 54 | kmem_zalloc(size_t size, unsigned int __nocast flags) |
1da177e4 LT |
55 | { |
56 | void *ptr; | |
57 | ||
58 | ptr = kmem_alloc(size, flags); | |
59 | if (ptr) | |
60 | memset((char *)ptr, 0, (int)size); | |
61 | return ptr; | |
62 | } | |
63 | ||
64 | void | |
65 | kmem_free(void *ptr, size_t size) | |
66 | { | |
67 | if (((unsigned long)ptr < VMALLOC_START) || | |
68 | ((unsigned long)ptr >= VMALLOC_END)) { | |
69 | kfree(ptr); | |
70 | } else { | |
71 | vfree(ptr); | |
72 | } | |
73 | } | |
74 | ||
75 | void * | |
760dea67 | 76 | kmem_realloc(void *ptr, size_t newsize, size_t oldsize, |
27496a8c | 77 | unsigned int __nocast flags) |
1da177e4 LT |
78 | { |
79 | void *new; | |
80 | ||
81 | new = kmem_alloc(newsize, flags); | |
82 | if (ptr) { | |
83 | if (new) | |
84 | memcpy(new, ptr, | |
85 | ((oldsize < newsize) ? oldsize : newsize)); | |
86 | kmem_free(ptr, oldsize); | |
87 | } | |
88 | return new; | |
89 | } | |
90 | ||
91 | void * | |
27496a8c | 92 | kmem_zone_alloc(kmem_zone_t *zone, unsigned int __nocast flags) |
1da177e4 | 93 | { |
27496a8c AV |
94 | int retries = 0; |
95 | gfp_t lflags = kmem_flags_convert(flags); | |
96 | void *ptr; | |
1da177e4 LT |
97 | |
98 | do { | |
99 | ptr = kmem_cache_alloc(zone, lflags); | |
100 | if (ptr || (flags & (KM_MAYFAIL|KM_NOSLEEP))) | |
101 | return ptr; | |
102 | if (!(++retries % 100)) | |
103 | printk(KERN_ERR "XFS: possible memory allocation " | |
104 | "deadlock in %s (mode:0x%x)\n", | |
105 | __FUNCTION__, lflags); | |
106 | blk_congestion_wait(WRITE, HZ/50); | |
107 | } while (1); | |
108 | } | |
109 | ||
110 | void * | |
27496a8c | 111 | kmem_zone_zalloc(kmem_zone_t *zone, unsigned int __nocast flags) |
1da177e4 LT |
112 | { |
113 | void *ptr; | |
114 | ||
115 | ptr = kmem_zone_alloc(zone, flags); | |
116 | if (ptr) | |
117 | memset((char *)ptr, 0, kmem_cache_size(zone)); | |
118 | return ptr; | |
119 | } |