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Commit 38f71479 authored by David Howells's avatar David Howells
Browse files

NOMMU: Improve procfs output using per-MM VMAs 



Improve procfs output using per-MM VMAs for process memory accounting.

Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
Tested-by: default avatarMike Frysinger <vapier.adi@gmail.com>
Acked-by: default avatarPaul Mundt <lethal@linux-sh.org>
parent dd8632a1

fs/proc/task_nommu.c

+22 −10
Original line number Diff line number Diff line
@@ -16,24 +16,31 @@ 
void task_mem(struct seq_file *m, struct mm_struct *mm)

{

	struct vm_area_struct *vma;

	struct vm_region *region;

	struct rb_node *p;

	unsigned long bytes = 0, sbytes = 0, slack = 0;

	unsigned long bytes = 0, sbytes = 0, slack = 0, size;

        

	down_read(&mm->mmap_sem);

	for (p = rb_first(&mm->mm_rb); p; p = rb_next(p)) {

		vma = rb_entry(p, struct vm_area_struct, vm_rb);



		bytes += kobjsize(vma);



		region = vma->vm_region;

		if (region) {

			size = kobjsize(region);

			size += region->vm_end - region->vm_start;

		} else {

			size = vma->vm_end - vma->vm_start;

		}



		if (atomic_read(&mm->mm_count) > 1 ||

		    vma->vm_region ||

		    vma->vm_flags & VM_MAYSHARE) {

			sbytes += kobjsize((void *) vma->vm_start);

			if (vma->vm_region)

				sbytes += kobjsize(vma->vm_region);

			sbytes += size;

		} else {

			bytes += kobjsize((void *) vma->vm_start);

			slack += kobjsize((void *) vma->vm_start) -

				(vma->vm_end - vma->vm_start);

			bytes += size;

			if (region)

				slack = region->vm_end - vma->vm_end;

		}

	}
@@ -77,7 +84,7 @@ unsigned long task_vsize(struct mm_struct *mm) 
	down_read(&mm->mmap_sem);

	for (p = rb_first(&mm->mm_rb); p; p = rb_next(p)) {

		vma = rb_entry(p, struct vm_area_struct, vm_rb);

		vsize += vma->vm_region->vm_end - vma->vm_region->vm_start;

		vsize += vma->vm_end - vma->vm_start;

	}

	up_read(&mm->mmap_sem);

	return vsize;
@@ -87,6 +94,7 @@ int task_statm(struct mm_struct *mm, int *shared, int *text, 
	       int *data, int *resident)

{

	struct vm_area_struct *vma;

	struct vm_region *region;

	struct rb_node *p;

	int size = kobjsize(mm);
@@ -94,7 +102,11 @@ int task_statm(struct mm_struct *mm, int *shared, int *text, 
	for (p = rb_first(&mm->mm_rb); p; p = rb_next(p)) {

		vma = rb_entry(p, struct vm_area_struct, vm_rb);

		size += kobjsize(vma);

		size += kobjsize((void *) vma->vm_start);

		region = vma->vm_region;

		if (region) {

			size += kobjsize(region);

			size += region->vm_end - region->vm_start;

		}

	}



	size += (*text = mm->end_code - mm->start_code);