2 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
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
7 * published by the Free Software Foundation.
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.
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
19 #include <linux/vmalloc.h>
20 #include <linux/highmem.h>
21 #include <linux/swap.h>
22 #include <linux/blkdev.h>
23 #include <linux/backing-dev.h>
27 #define MAX_VMALLOCS 6
28 #define MAX_SLAB_SIZE 0x20000
31 kmem_alloc(size_t size, unsigned int __nocast flags)
34 gfp_t lflags = kmem_flags_convert(flags);
38 if (unlikely(!(flags & KM_LARGE) && (size > PAGE_SIZE))) {
39 printk(KERN_WARNING "Large %s attempt, size=%ld\n",
40 __func__, (long)size);
46 if (size < MAX_SLAB_SIZE || retries > MAX_VMALLOCS)
47 ptr = kmalloc(size, lflags);
49 ptr = __vmalloc(size, lflags, PAGE_KERNEL);
50 if (ptr || (flags & (KM_MAYFAIL|KM_NOSLEEP)))
52 if (!(++retries % 100))
53 printk(KERN_ERR "XFS: possible memory allocation "
54 "deadlock in %s (mode:0x%x)\n",
56 congestion_wait(WRITE, HZ/50);
61 kmem_zalloc(size_t size, unsigned int __nocast flags)
65 ptr = kmem_alloc(size, flags);
67 memset((char *)ptr, 0, (int)size);
72 kmem_zalloc_greedy(size_t *size, size_t minsize, size_t maxsize,
73 unsigned int __nocast flags)
76 size_t kmsize = maxsize;
77 unsigned int kmflags = (flags & ~KM_SLEEP) | KM_NOSLEEP;
79 while (!(ptr = kmem_zalloc(kmsize, kmflags))) {
80 if ((kmsize <= minsize) && (flags & KM_NOSLEEP))
82 if ((kmsize >>= 1) <= minsize) {
95 if (!is_vmalloc_addr(ptr)) {
103 kmem_realloc(void *ptr, size_t newsize, size_t oldsize,
104 unsigned int __nocast flags)
108 new = kmem_alloc(newsize, flags);
112 ((oldsize < newsize) ? oldsize : newsize));
119 kmem_zone_alloc(kmem_zone_t *zone, unsigned int __nocast flags)
122 gfp_t lflags = kmem_flags_convert(flags);
126 ptr = kmem_cache_alloc(zone, lflags);
127 if (ptr || (flags & (KM_MAYFAIL|KM_NOSLEEP)))
129 if (!(++retries % 100))
130 printk(KERN_ERR "XFS: possible memory allocation "
131 "deadlock in %s (mode:0x%x)\n",
133 congestion_wait(WRITE, HZ/50);
138 kmem_zone_zalloc(kmem_zone_t *zone, unsigned int __nocast flags)
142 ptr = kmem_zone_alloc(zone, flags);
144 memset((char *)ptr, 0, kmem_cache_size(zone));