[PATCH] zap anonymous unremarkable

[Hugh Dickins]

zap_pte_range is wasting time marking anon pages accessed: its original
!PageSwapCache test should have been reinstated when page_mapping was
changed to return swapper_space; or more simply, just check !PageAnon.

Signed-off-by: Hugh Dickins <hugh@xxxxxxxxxxx>

--- 2.6.7/mm/memory.c	2004-06-16 06:20:40.000000000 +0100
+++ linux/mm/memory.c	2004-06-22 13:17:24.445430864 +0100
@@ -407,7 +407,7 @@ static void zap_pte_range(struct mmu_gat
 				set_pte(ptep, pgoff_to_pte(page->index));
 			if (pte_dirty(pte))
 				set_page_dirty(page);
-			if (pte_young(pte) && page_mapping(page))
+			if (pte_young(pte) && !PageAnon(page))
 				mark_page_accessed(page);
 			tlb->freed++;
 			page_remove_rmap(page);

-
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