diff options
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/vmalloc.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/mm/vmalloc.c b/mm/vmalloc.c index 0f751f2068c3..1d9878b7cf52 100644 --- a/mm/vmalloc.c +++ b/mm/vmalloc.c @@ -2645,5 +2645,49 @@ static int __init proc_vmalloc_init(void) return 0; } module_init(proc_vmalloc_init); + +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); + } +} #endif |