Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 2 | * Copyright (c) 2000-2005 Silicon Graphics, Inc. |
| 3 | * All Rights Reserved. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | * |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 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 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | * published by the Free Software Foundation. |
| 8 | * |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 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. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | * |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 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 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | #include "time.h" |
| 25 | #include "kmem.h" |
| 26 | |
| 27 | #define MAX_VMALLOCS 6 |
| 28 | #define MAX_SLAB_SIZE 0x20000 |
| 29 | |
| 30 | |
| 31 | void * |
Al Viro | 27496a8 | 2005-10-21 03:20:48 -0400 | [diff] [blame] | 32 | kmem_alloc(size_t size, unsigned int __nocast flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | { |
Al Viro | 27496a8 | 2005-10-21 03:20:48 -0400 | [diff] [blame] | 34 | int retries = 0; |
| 35 | gfp_t lflags = kmem_flags_convert(flags); |
| 36 | void *ptr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 * |
Al Viro | 27496a8 | 2005-10-21 03:20:48 -0400 | [diff] [blame] | 54 | kmem_zalloc(size_t size, unsigned int __nocast flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 * |
Christoph Hellwig | 760dea6 | 2005-09-02 16:56:02 +1000 | [diff] [blame] | 76 | kmem_realloc(void *ptr, size_t newsize, size_t oldsize, |
Al Viro | 27496a8 | 2005-10-21 03:20:48 -0400 | [diff] [blame] | 77 | unsigned int __nocast flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 * |
Al Viro | 27496a8 | 2005-10-21 03:20:48 -0400 | [diff] [blame] | 92 | kmem_zone_alloc(kmem_zone_t *zone, unsigned int __nocast flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | { |
Al Viro | 27496a8 | 2005-10-21 03:20:48 -0400 | [diff] [blame] | 94 | int retries = 0; |
| 95 | gfp_t lflags = kmem_flags_convert(flags); |
| 96 | void *ptr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 * |
Al Viro | 27496a8 | 2005-10-21 03:20:48 -0400 | [diff] [blame] | 111 | kmem_zone_zalloc(kmem_zone_t *zone, unsigned int __nocast flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | } |