Re: fix text reporting in O(1) proc_pid_statm()

[William Lee Irwin III <wli@holomorphy.com>]

On Tue, Aug 24, 2004 at 04:12:36PM -0700, William Lee Irwin III wrote:
>> This would not be difficult to perform additional accounting for.
>> I'll follow up with that shortly.

On Tue, Aug 24, 2004 at 04:18:41PM -0700, William Lee Irwin III wrote:
> Account reserved memory properly as per acahalan's sepecified semantics.

Unrelated fix. Unaccount VM_DONTCOPY vmas properly; the child inherits
the whole of the parent's virtual accounting from the memcpy() in
copy_mm(), but the VM_DONTCOPY check here is where a decision is made
for the child not to inherit the vmas corresponding to some accounted
memory usages. Hence, unaccount them when skipping over them here.


-- wli

Index: mm4-2.6.8.1/kernel/fork.c
===================================================================
--- mm4-2.6.8.1.orig/kernel/fork.c	2004-08-23 16:19:50.000000000 -0700
+++ mm4-2.6.8.1/kernel/fork.c	2004-08-24 16:19:45.404121128 -0700
@@ -391,8 +391,11 @@
 	for (mpnt = current->mm->mmap ; mpnt ; mpnt = mpnt->vm_next) {
 		struct file *file;
 
-		if(mpnt->vm_flags & VM_DONTCOPY)
+		if (mpnt->vm_flags & VM_DONTCOPY) {
+			__vm_stat_account(mm, mpnt->vm_flags, mpnt->vm_file,
+							-vma_pages(mpnt));
 			continue;
+		}
 		charge = 0;
 		if (mpnt->vm_flags & VM_ACCOUNT) {
 			unsigned int len = (mpnt->vm_end - mpnt->vm_start) >> PAGE_SHIFT;