commit 7179906293ebdc333f14a03d3e58b03604848f3c
author Kirill Korotaev <dev@sw.ru> Mon May 16 21:53:18 2005 -0700
committer Linus Torvalds <torvalds@ppc970.osdl.org> Tue May 17 07:59:12 2005 -0700
tree 48623522c6af985400e6181ce1b18d98b910c0fc
parent 202d182a92c60416680e31baa697faa60b0882f5

[PATCH] mm acct accounting fix

This patch fixes mm->total_vm and mm->locked_vm acctounting in case when
move_page_tables() fails inside move_vma().

Signed-Off-By: Kirill Korotaev <dev@sw.ru>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

mm/mremap.c

diff --git a/mm/mremap.c b/mm/mremap.c
index 0dd7ace..ec7238a 100644
--- a/mm/mremap.c
+++ b/mm/mremap.c
@@ -224,6 +224,12 @@
 			split = 1;
 	}
 
+	/*
+	 * if we failed to move page tables we still do total_vm increment
+	 * since do_munmap() will decrement it by old_len == new_len
+	 */
+	mm->total_vm += new_len >> PAGE_SHIFT;
+
 	if (do_munmap(mm, old_addr, old_len) < 0) {
 		/* OOM: unable to split vma, just get accounts right */
 		vm_unacct_memory(excess >> PAGE_SHIFT);
@@ -237,7 +243,6 @@
 			vma->vm_next->vm_flags |= VM_ACCOUNT;
 	}
 
-	mm->total_vm += new_len >> PAGE_SHIFT;
 	__vm_stat_account(mm, vma->vm_flags, vma->vm_file, new_len>>PAGE_SHIFT);
 	if (vm_flags & VM_LOCKED) {
 		mm->locked_vm += new_len >> PAGE_SHIFT;