From: Hugh Dickins Date: Sat, 3 Sep 2005 22:54:43 +0000 (-0700) Subject: [PATCH] rmap: don't test rss X-Git-Tag: v2.6.14-rc1~975 X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=839b9685e80592809d6dfdd865986cd1b5ddc2fb;p=linux-2.6-omap-h63xx.git [PATCH] rmap: don't test rss 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 Signed-off-by: Linus Torvalds --- diff --git a/mm/rmap.c b/mm/rmap.c index facb8cdca66..28c6cf96d3c 100644 --- a/mm/rmap.c +++ b/mm/rmap.c @@ -289,8 +289,6 @@ static int page_referenced_one(struct page *page, pte_t *pte; int referenced = 0; - if (!get_mm_counter(mm, rss)) - goto out; address = vma_address(page, vma); if (address == -EFAULT) goto out; @@ -517,8 +515,6 @@ static int try_to_unmap_one(struct page *page, struct vm_area_struct *vma) 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; @@ -766,8 +762,7 @@ static int try_to_unmap_file(struct page *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;