[PATCH] mm: zap_pte_range dec rss
Small adjustment: zap_pte_range decrement its rss counts from 0 then finally add, avoiding negations - we don't have or need a sub_mm_rss. 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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@ -609,13 +609,13 @@ static void zap_pte_range(struct mmu_gather *tlb,
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set_pte_at(mm, addr, pte,
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pgoff_to_pte(page->index));
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if (PageAnon(page))
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anon_rss++;
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anon_rss--;
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else {
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if (pte_dirty(ptent))
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set_page_dirty(page);
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if (pte_young(ptent))
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mark_page_accessed(page);
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file_rss++;
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file_rss--;
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}
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page_remove_rmap(page);
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tlb_remove_page(tlb, page);
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@ -632,7 +632,7 @@ static void zap_pte_range(struct mmu_gather *tlb,
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pte_clear_full(mm, addr, pte, tlb->fullmm);
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} while (pte++, addr += PAGE_SIZE, addr != end);
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add_mm_rss(mm, -file_rss, -anon_rss);
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add_mm_rss(mm, file_rss, anon_rss);
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pte_unmap(pte - 1);
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}
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