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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 | /* * Copyright (c) 2000-2004 Silicon Graphics, Inc. All Rights Reserved. * * This program is free software; you can redistribute it and/or modify it * under the terms of version 2 of the GNU General Public License as * published by the Free Software Foundation. * * This program is distributed in the hope that it would be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. * * Further, this software is distributed without any warranty that it is * free of the rightful claim of any third person regarding infringement * or the like. Any license provided herein, whether implied or * otherwise, applies only to this software file. Patent licenses, if * any, provided herein do not apply to combinations of this program with * other software, or any other product whatsoever. * * You should have received a copy of the GNU General Public License along * with this program; if not, write the Free Software Foundation, Inc., 59 * Temple Place - Suite 330, Boston MA 02111-1307, USA. * * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy, * Mountain View, CA 94043, or: * * http://www.sgi.com * * For further information regarding this notice, see: * * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/ */ #include <linux/sched.h> #include <linux/mm.h> #include <linux/vmalloc.h> #include <linux/highmem.h> #include <linux/swap.h> #include <linux/blkdev.h> #include "time.h" #include "kmem.h" #define MAX_VMALLOCS 6 #define MAX_SLAB_SIZE 0x20000 void * kmem_alloc(size_t size, gfp_t flags) { int retries = 0; unsigned int lflags = kmem_flags_convert(flags); void *ptr; do { if (size < MAX_SLAB_SIZE || retries > MAX_VMALLOCS) ptr = kmalloc(size, lflags); else ptr = __vmalloc(size, lflags, PAGE_KERNEL); if (ptr || (flags & (KM_MAYFAIL|KM_NOSLEEP))) return ptr; if (!(++retries % 100)) printk(KERN_ERR "XFS: possible memory allocation " "deadlock in %s (mode:0x%x)\n", __FUNCTION__, lflags); blk_congestion_wait(WRITE, HZ/50); } while (1); } void * kmem_zalloc(size_t size, gfp_t flags) { void *ptr; ptr = kmem_alloc(size, flags); if (ptr) memset((char *)ptr, 0, (int)size); return ptr; } void kmem_free(void *ptr, size_t size) { if (((unsigned long)ptr < VMALLOC_START) || ((unsigned long)ptr >= VMALLOC_END)) { kfree(ptr); } else { vfree(ptr); } } void * kmem_realloc(void *ptr, size_t newsize, size_t oldsize, gfp_t flags) { void *new; new = kmem_alloc(newsize, flags); if (ptr) { if (new) memcpy(new, ptr, ((oldsize < newsize) ? oldsize : newsize)); kmem_free(ptr, oldsize); } return new; } void * kmem_zone_alloc(kmem_zone_t *zone, gfp_t flags) { int retries = 0; unsigned int lflags = kmem_flags_convert(flags); void *ptr; do { ptr = kmem_cache_alloc(zone, lflags); if (ptr || (flags & (KM_MAYFAIL|KM_NOSLEEP))) return ptr; if (!(++retries % 100)) printk(KERN_ERR "XFS: possible memory allocation " "deadlock in %s (mode:0x%x)\n", __FUNCTION__, lflags); blk_congestion_wait(WRITE, HZ/50); } while (1); } void * kmem_zone_zalloc(kmem_zone_t *zone, gfp_t flags) { void *ptr; ptr = kmem_zone_alloc(zone, flags); if (ptr) memset((char *)ptr, 0, kmem_cache_size(zone)); return ptr; } |