From: Hugh Dickins 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 Signed-off-by: Andrew Morton --- 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; _