diff options
Diffstat (limited to 'ANDROID_3.4.5/fs/proc/mmu.c')
| -rw-r--r-- | ANDROID_3.4.5/fs/proc/mmu.c | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/ANDROID_3.4.5/fs/proc/mmu.c b/ANDROID_3.4.5/fs/proc/mmu.c new file mode 100644 index 00000000..8ae221df --- /dev/null +++ b/ANDROID_3.4.5/fs/proc/mmu.c @@ -0,0 +1,60 @@ +/* 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/spinlock.h> +#include <linux/vmalloc.h> +#include <linux/highmem.h> +#include <asm/pgtable.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); + } +} |