aboutsummaryrefslogtreecommitdiffstats
path: root/fs/proc/mmu.c
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /fs/proc/mmu.c
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'fs/proc/mmu.c')
-rw-r--r--fs/proc/mmu.c67
1 files changed, 67 insertions, 0 deletions
diff --git a/fs/proc/mmu.c b/fs/proc/mmu.c
new file mode 100644
index 000000000000..a7041038ad56
--- /dev/null
+++ b/fs/proc/mmu.c
@@ -0,0 +1,67 @@
1/* mmu.c: mmu memory info files
2 *
3 * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 */
11
12#include <linux/types.h>
13#include <linux/errno.h>
14#include <linux/time.h>
15#include <linux/kernel.h>
16#include <linux/string.h>
17#include <linux/mman.h>
18#include <linux/proc_fs.h>
19#include <linux/mm.h>
20#include <linux/mmzone.h>
21#include <linux/pagemap.h>
22#include <linux/swap.h>
23#include <linux/slab.h>
24#include <linux/smp.h>
25#include <linux/seq_file.h>
26#include <linux/hugetlb.h>
27#include <linux/vmalloc.h>
28#include <asm/uaccess.h>
29#include <asm/pgtable.h>
30#include <asm/tlb.h>
31#include <asm/div64.h>
32#include "internal.h"
33
34void get_vmalloc_info(struct vmalloc_info *vmi)
35{
36 struct vm_struct *vma;
37 unsigned long free_area_size;
38 unsigned long prev_end;
39
40 vmi->used = 0;
41
42 if (!vmlist) {
43 vmi->largest_chunk = VMALLOC_TOTAL;
44 }
45 else {
46 vmi->largest_chunk = 0;
47
48 prev_end = VMALLOC_START;
49
50 read_lock(&vmlist_lock);
51
52 for (vma = vmlist; vma; vma = vma->next) {
53 vmi->used += vma->size;
54
55 free_area_size = (unsigned long) vma->addr - prev_end;
56 if (vmi->largest_chunk < free_area_size)
57 vmi->largest_chunk = free_area_size;
58
59 prev_end = vma->size + (unsigned long) vma->addr;
60 }
61
62 if (VMALLOC_END - prev_end > vmi->largest_chunk)
63 vmi->largest_chunk = VMALLOC_END - prev_end;
64
65 read_unlock(&vmlist_lock);
66 }
67}