1 files changed, 134 insertions, 0 deletions

diff --git a/fs/xfs/linux-2.6/kmem.c b/fs/xfs/linux-2.6/kmem.c
new file mode 100644
index 000000000000..364ea8c386b1
--- /dev/null
+++ b/fs/xfs/linux-2.6/kmem.c
@@ -0,0 +1,134 @@
+/*
+ * 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;
+}