patch-2.4.27 linux-2.4.27/fs/xfs/linux/kmem.c
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- Lines: 245
- Date:
1969-12-31 16:00:00.000000000 -0800
- Orig file:
linux-2.4.26/fs/xfs/linux/kmem.c
- Orig date:
2004-02-18 05:36:31.000000000 -0800
diff -urN linux-2.4.26/fs/xfs/linux/kmem.c linux-2.4.27/fs/xfs/linux/kmem.c
@@ -1,244 +0,0 @@
-/*
- * Copyright (c) 2000-2002 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/slab.h>
-
-#include "time.h"
-#include "kmem.h"
-
-#define DEF_PRIORITY (6)
-#define MAX_SLAB_SIZE 0x10000
-#define MAX_SHAKE 8
-
-static kmem_shake_func_t shake_list[MAX_SHAKE];
-static DECLARE_MUTEX(shake_sem);
-
-kmem_shaker_t
-kmem_shake_register(kmem_shake_func_t sfunc)
-{
- int i;
-
- down(&shake_sem);
- for (i = 0; i < MAX_SHAKE; i++) {
- if (shake_list[i] == NULL) {
- shake_list[i] = sfunc;
- break;
- }
- }
- if (i == MAX_SHAKE)
- BUG();
- up(&shake_sem);
-
- return (kmem_shaker_t)sfunc;
-}
-
-void
-kmem_shake_deregister(kmem_shaker_t sfunc)
-{
- int i;
-
- down(&shake_sem);
- for (i = 0; i < MAX_SHAKE; i++) {
- if (shake_list[i] == (kmem_shake_func_t)sfunc)
- break;
- }
- if (i == MAX_SHAKE)
- BUG();
- for (; i < MAX_SHAKE - 1; i++) {
- shake_list[i] = shake_list[i+1];
- }
- shake_list[i] = NULL;
- up(&shake_sem);
-}
-
-static __inline__ void kmem_shake(void)
-{
- int i;
-
- down(&shake_sem);
- for (i = 0; i < MAX_SHAKE && shake_list[i]; i++)
- (*shake_list[i])(0, 0);
- up(&shake_sem);
- delay(10);
-}
-
-void *
-kmem_alloc(size_t size, int flags)
-{
- int shrink = DEF_PRIORITY; /* # times to try to shrink cache */
- int lflags = kmem_flags_convert(flags);
- int nosleep = flags & KM_NOSLEEP;
- void *rval;
-
-repeat:
- if (MAX_SLAB_SIZE < size) {
- /* Avoid doing filesystem sensitive stuff to get this */
- rval = __vmalloc(size, lflags, PAGE_KERNEL);
- } else {
- rval = kmalloc(size, lflags);
- }
-
- if (rval || nosleep)
- return rval;
-
- /*
- * KM_SLEEP callers don't expect a failure
- */
- if (shrink) {
- kmem_shake();
-
- shrink--;
- goto repeat;
- }
-
- rval = __vmalloc(size, lflags, PAGE_KERNEL);
- if (!rval && !nosleep)
- panic("kmem_alloc: NULL memory on KM_SLEEP request!");
-
- return rval;
-}
-
-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;
-}
-
-kmem_zone_t *
-kmem_zone_init(int size, char *zone_name)
-{
- return kmem_cache_create(zone_name, size, 0, 0, NULL, NULL);
-}
-
-void *
-kmem_zone_alloc(kmem_zone_t *zone, int flags)
-{
- int shrink = DEF_PRIORITY; /* # times to try to shrink cache */
- void *ptr = NULL;
-
-repeat:
- ptr = kmem_cache_alloc(zone, kmem_flags_convert(flags));
-
- if (ptr || (flags & KM_NOSLEEP))
- return ptr;
-
- /*
- * KM_SLEEP callers don't expect a failure
- */
- if (shrink) {
- kmem_shake();
-
- shrink--;
- goto repeat;
- }
-
- if (flags & KM_SLEEP)
- panic("kmem_zone_alloc: NULL memory on KM_SLEEP request!");
-
- return NULL;
-}
-
-void *
-kmem_zone_zalloc(kmem_zone_t *zone, int flags)
-{
- int shrink = DEF_PRIORITY; /* # times to try to shrink cache */
- void *ptr = NULL;
-
-repeat:
- ptr = kmem_cache_alloc(zone, kmem_flags_convert(flags));
-
- if (ptr) {
- memset(ptr, 0, kmem_cache_size(zone));
- return ptr;
- }
-
- if (flags & KM_NOSLEEP)
- return ptr;
-
- /*
- * KM_SLEEP callers don't expect a failure
- */
- if (shrink) {
- kmem_shake();
-
- shrink--;
- goto repeat;
- }
-
- if (flags & KM_SLEEP)
- panic("kmem_zone_zalloc: NULL memory on KM_SLEEP request!");
-
- return NULL;
-}
-
-void
-kmem_zone_free(kmem_zone_t *zone, void *ptr)
-{
- kmem_cache_free(zone, ptr);
-}
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