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SubjectRe: [PATCH 12/24] task_diag: add a new group to get tasks memory mappings (v2)
On 7/14/15 2:08 PM, Oleg Nesterov wrote:
> On 07/06, Andrey Vagin wrote:
>>
>> +static int task_vma_num(struct mm_struct *mm)
>> +{
>> + struct vm_area_struct *vma;
>> + int n_vma = 0;
>> +
>> + if (!mm || !atomic_inc_not_zero(&mm->mm_users))
>> + return 0;
>> +
>> + down_read(&mm->mmap_sem);
>> + for (vma = mm->mmap; vma; vma = vma->vm_next, n_vma++)
>> + ;
>> +
>> + up_read(&mm->mmap_sem);
>> + mmput(mm);
>> +
>> + return n_vma;
>> +}
>
> Hmm. How about
>
> int task_vma_num(struct mm_struct *mm)
> {
> return mm->map_count;
> }
>
> ?

makes sense. Thanks for the pointer.



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