From: Hugh Dickins <hugh@veritas.com>
Remove the three get_mm_counter(mm, rss) tests from rmap.c: there was a
time when testing rss was important to avoid a particular race between
dup_mmap and the anonmm rmap; but now it's just a rather silly pseudo-
optimization, made even more obscure by the get_mm_counter macro.
Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
---
mm/rmap.c | 7 +------
1 files changed, 1 insertion(+), 6 deletions(-)
diff -puN mm/rmap.c~rmap-dont-test-rss mm/rmap.c
--- devel/mm/rmap.c~rmap-dont-test-rss 2005-07-08 22:41:36.000000000 -0700
+++ devel-akpm/mm/rmap.c 2005-07-08 22:41:36.000000000 -0700
@@ -289,8 +289,6 @@ static int page_referenced_one(struct pa
pte_t *pte;
int referenced = 0;
- if (!get_mm_counter(mm, rss))
- goto out;
address = vma_address(page, vma);
if (address == -EFAULT)
goto out;
@@ -521,8 +519,6 @@ static int try_to_unmap_one(struct page
pte_t pteval;
int ret = SWAP_AGAIN;
- if (!get_mm_counter(mm, rss))
- goto out;
address = vma_address(page, vma);
if (address == -EFAULT)
goto out;
@@ -770,8 +766,7 @@ static int try_to_unmap_file(struct page
if (vma->vm_flags & (VM_LOCKED|VM_RESERVED))
continue;
cursor = (unsigned long) vma->vm_private_data;
- while (get_mm_counter(vma->vm_mm, rss) &&
- cursor < max_nl_cursor &&
+ while ( cursor < max_nl_cursor &&
cursor < vma->vm_end - vma->vm_start) {
try_to_unmap_cluster(cursor, &mapcount, vma);
cursor += CLUSTER_SIZE;
_