Merge to kernel-2.6.20-1.2949.fc6.vs2.2.0.1

[linux-2.6.git] / fs / xfs / linux-2.6 / kmem.c

diff --git a/fs/xfs/linux-2.6/kmem.c b/fs/xfs/linux-2.6/kmem.c
index 364ea8c..004baf6 100644 (file)
--- a/fs/xfs/linux-2.6/kmem.c
+++ b/fs/xfs/linux-2.6/kmem.c
@@ -1,56 +1,48 @@
 /*
- * Copyright (c) 2000-2004 Silicon Graphics, Inc.  All Rights Reserved.
+ * Copyright (c) 2000-2005 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
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms 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.
+ * 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.  See the
+ * GNU General Public License for more details.
  *
- * 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/
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write the Free Software Foundation,
+ * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  */
-
 #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 <linux/backing-dev.h>
 #include "time.h"
 #include "kmem.h"
 
 #define MAX_VMALLOCS   6
 #define MAX_SLAB_SIZE  0x20000
 
-
 void *
-kmem_alloc(size_t size, int flags)
+kmem_alloc(size_t size, unsigned int __nocast flags)
 {
        int     retries = 0;
-       int     lflags = kmem_flags_convert(flags);
+       gfp_t   lflags = kmem_flags_convert(flags);
        void    *ptr;
 
+#ifdef DEBUG
+       if (unlikely(!(flags & KM_LARGE) && (size > PAGE_SIZE))) {
+               printk(KERN_WARNING "Large %s attempt, size=%ld\n",
+                       __FUNCTION__, (long)size);
+               dump_stack();
+       }
+#endif
+
        do {
                if (size < MAX_SLAB_SIZE || retries > MAX_VMALLOCS)
                        ptr = kmalloc(size, lflags);
@@ -62,12 +54,12 @@ kmem_alloc(size_t size, int flags)
                        printk(KERN_ERR "XFS: possible memory allocation "
                                        "deadlock in %s (mode:0x%x)\n",
                                        __FUNCTION__, lflags);
-               blk_congestion_wait(WRITE, HZ/50);
+               congestion_wait(WRITE, HZ/50);
        } while (1);
 }
 
 void *
-kmem_zalloc(size_t size, int flags)
+kmem_zalloc(size_t size, unsigned int __nocast flags)
 {
        void    *ptr;
 
@@ -77,6 +69,27 @@ kmem_zalloc(size_t size, int flags)
        return ptr;
 }
 
+void *
+kmem_zalloc_greedy(size_t *size, size_t minsize, size_t maxsize,
+                  unsigned int __nocast flags)
+{
+       void            *ptr;
+       size_t          kmsize = maxsize;
+       unsigned int    kmflags = (flags & ~KM_SLEEP) | KM_NOSLEEP;
+
+       while (!(ptr = kmem_zalloc(kmsize, kmflags))) {
+               if ((kmsize <= minsize) && (flags & KM_NOSLEEP))
+                       break;
+               if ((kmsize >>= 1) <= minsize) {
+                       kmsize = minsize;
+                       kmflags = flags;
+               }
+       }
+       if (ptr)
+               *size = kmsize;
+       return ptr;
+}
+
 void
 kmem_free(void *ptr, size_t size)
 {
@@ -89,7 +102,8 @@ kmem_free(void *ptr, size_t size)
 }
 
 void *
-kmem_realloc(void *ptr, size_t newsize, size_t oldsize, int flags)
+kmem_realloc(void *ptr, size_t newsize, size_t oldsize,
+            unsigned int __nocast flags)
 {
        void    *new;
 
@@ -104,10 +118,10 @@ kmem_realloc(void *ptr, size_t newsize, size_t oldsize, int flags)
 }
 
 void *
-kmem_zone_alloc(kmem_zone_t *zone, int flags)
+kmem_zone_alloc(kmem_zone_t *zone, unsigned int __nocast flags)
 {
        int     retries = 0;
-       int     lflags = kmem_flags_convert(flags);
+       gfp_t   lflags = kmem_flags_convert(flags);
        void    *ptr;
 
        do {
@@ -118,12 +132,12 @@ kmem_zone_alloc(kmem_zone_t *zone, int flags)
                        printk(KERN_ERR "XFS: possible memory allocation "
                                        "deadlock in %s (mode:0x%x)\n",
                                        __FUNCTION__, lflags);
-               blk_congestion_wait(WRITE, HZ/50);
+               congestion_wait(WRITE, HZ/50);
        } while (1);
 }
 
 void *
-kmem_zone_zalloc(kmem_zone_t *zone, int flags)
+kmem_zone_zalloc(kmem_zone_t *zone, unsigned int __nocast flags)
 {
        void    *ptr;