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NOMMU: Improve procfs output using per-MM VMAs

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

Signed-off-by: David Howells <dhowells@redhat.com>
Tested-by: Mike Frysinger <vapier.adi@gmail.com>
Acked-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
David Howells 2009-01-08 12:04:47 +00:00
parent dd8632a12e
commit 38f714795b
1 changed files with 24 additions and 12 deletions
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36
fs/proc/task_nommu.c
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@ -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);
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);
region = vma->vm_region;
if (region) {
size = kobjsize(region);
size += region->vm_end - region->vm_start;
} else {
bytes += kobjsize((void *) vma->vm_start);
slack += kobjsize((void *) vma->vm_start) -
(vma->vm_end - vma->vm_start);
size = vma->vm_end - vma->vm_start;
}
if (atomic_read(&mm->mm_count) > 1 ||
vma->vm_flags & VM_MAYSHARE) {
sbytes += size;
} else {
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);