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
18 #include <linux/sched.h>
20 #include <linux/vmalloc.h>
21 #include <linux/highmem.h>
22 #include <linux/swap.h>
23 #include <linux/blkdev.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 (size < MAX_SLAB_SIZE || retries > MAX_VMALLOCS)
39 ptr = kmalloc(size, lflags);
41 ptr = __vmalloc(size, lflags, PAGE_KERNEL);
42 if (ptr || (flags & (KM_MAYFAIL|KM_NOSLEEP)))
44 if (!(++retries % 100))
45 printk(KERN_ERR "XFS: possible memory allocation "
46 "deadlock in %s (mode:0x%x)\n",
47 __FUNCTION__, lflags);
48 blk_congestion_wait(WRITE, HZ/50);
53 kmem_zalloc(size_t size, unsigned int __nocast flags)
57 ptr = kmem_alloc(size, flags);
59 memset((char *)ptr, 0, (int)size);
64 kmem_free(void *ptr, size_t size)
66 if (((unsigned long)ptr < VMALLOC_START) ||
67 ((unsigned long)ptr >= VMALLOC_END)) {
75 kmem_realloc(void *ptr, size_t newsize, size_t oldsize,
76 unsigned int __nocast flags)
80 new = kmem_alloc(newsize, flags);
84 ((oldsize < newsize) ? oldsize : newsize));
85 kmem_free(ptr, oldsize);
91 kmem_zone_alloc(kmem_zone_t *zone, unsigned int __nocast flags)
94 gfp_t lflags = kmem_flags_convert(flags);
98 ptr = kmem_cache_alloc(zone, lflags);
99 if (ptr || (flags & (KM_MAYFAIL|KM_NOSLEEP)))
101 if (!(++retries % 100))
102 printk(KERN_ERR "XFS: possible memory allocation "
103 "deadlock in %s (mode:0x%x)\n",
104 __FUNCTION__, lflags);
105 blk_congestion_wait(WRITE, HZ/50);
110 kmem_zone_zalloc(kmem_zone_t *zone, unsigned int __nocast flags)
114 ptr = kmem_zone_alloc(zone, flags);
116 memset((char *)ptr, 0, kmem_cache_size(zone));