135 lines
3.2 KiB
C
135 lines
3.2 KiB
C
/*
|
|
* 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, int flags)
|
|
{
|
|
int retries = 0;
|
|
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, int 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, int 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, int flags)
|
|
{
|
|
int retries = 0;
|
|
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, int flags)
|
|
{
|
|
void *ptr;
|
|
|
|
ptr = kmem_zone_alloc(zone, flags);
|
|
if (ptr)
|
|
memset((char *)ptr, 0, kmem_cache_size(zone));
|
|
return ptr;
|
|
}
|