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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>
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1 changed files with 1 additions and 6 deletions
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@ -289,8 +289,6 @@ static int page_referenced_one(struct page *page,
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pte_t *pte;
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int referenced = 0;
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if (!get_mm_counter(mm, rss))
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goto out;
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address = vma_address(page, vma);
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if (address == -EFAULT)
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goto out;
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@ -517,8 +515,6 @@ static int try_to_unmap_one(struct page *page, struct vm_area_struct *vma)
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pte_t pteval;
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int ret = SWAP_AGAIN;
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if (!get_mm_counter(mm, rss))
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goto out;
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address = vma_address(page, vma);
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if (address == -EFAULT)
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goto out;
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@ -766,8 +762,7 @@ static int try_to_unmap_file(struct page *page)
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if (vma->vm_flags & (VM_LOCKED|VM_RESERVED))
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continue;
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cursor = (unsigned long) vma->vm_private_data;
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while (get_mm_counter(vma->vm_mm, rss) &&
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cursor < max_nl_cursor &&
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while ( cursor < max_nl_cursor &&
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cursor < vma->vm_end - vma->vm_start) {
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try_to_unmap_cluster(cursor, &mapcount, vma);
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cursor += CLUSTER_SIZE;
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