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[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 <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Hugh Dickins 2005-09-03 15:54:43 -07:00 committed by Linus Torvalds
parent 3279ffd97f
commit 839b9685e8
1 changed files with 1 additions and 6 deletions
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7
mm/rmap.c
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@ -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;