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- /* mmu.c: mmu memory info files
- *
- * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
- * Written by David Howells (dhowells@redhat.com)
- *
- * 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; either version
- * 2 of the License, or (at your option) any later version.
- */
- #include <linux/types.h>
- #include <linux/errno.h>
- #include <linux/time.h>
- #include <linux/kernel.h>
- #include <linux/string.h>
- #include <linux/mman.h>
- #include <linux/proc_fs.h>
- #include <linux/mm.h>
- #include <linux/mmzone.h>
- #include <linux/pagemap.h>
- #include <linux/swap.h>
- #include <linux/slab.h>
- #include <linux/smp.h>
- #include <linux/seq_file.h>
- #include <linux/hugetlb.h>
- #include <linux/vmalloc.h>
- #include <asm/uaccess.h>
- #include <asm/pgtable.h>
- #include <asm/tlb.h>
- #include <asm/div64.h>
- #include "internal.h"
- void get_vmalloc_info(struct vmalloc_info *vmi)
- {
- struct vm_struct *vma;
- unsigned long free_area_size;
- unsigned long prev_end;
- vmi->used = 0;
- if (!vmlist) {
- vmi->largest_chunk = VMALLOC_TOTAL;
- }
- else {
- vmi->largest_chunk = 0;
- prev_end = VMALLOC_START;
- read_lock(&vmlist_lock);
- for (vma = vmlist; vma; vma = vma->next) {
- unsigned long addr = (unsigned long) vma->addr;
- /*
- * Some archs keep another range for modules in vmlist
- */
- if (addr < VMALLOC_START)
- continue;
- if (addr >= VMALLOC_END)
- break;
- vmi->used += vma->size;
- free_area_size = addr - prev_end;
- if (vmi->largest_chunk < free_area_size)
- vmi->largest_chunk = free_area_size;
- prev_end = vma->size + addr;
- }
- if (VMALLOC_END - prev_end > vmi->largest_chunk)
- vmi->largest_chunk = VMALLOC_END - prev_end;
- read_unlock(&vmlist_lock);
- }
- }
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