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[PATCH] mm: pfault optimisation

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This atomic operation is superfluous: the pte will be added with the
referenced bit set, and the page will be referenced through this mapping after
the page fault handler returns anyway.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Cc: 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:
Nick Piggin 2006-01-06 00:11:13 -08:00 committed by Linus Torvalds
parent 9617d95e6e
commit 41e9b63b35
1 changed files with 0 additions and 1 deletions
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mm/memory.c
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@ -1977,7 +1977,6 @@ static int do_anonymous_page(struct mm_struct *mm, struct vm_area_struct *vma,
goto release; goto release;
inc_mm_counter(mm, anon_rss); inc_mm_counter(mm, anon_rss);
lru_cache_add_active(page); lru_cache_add_active(page);
SetPageReferenced(page);
page_add_new_anon_rmap(page, vma, address); page_add_new_anon_rmap(page, vma, address);
} else { } else {
/* Map the ZERO_PAGE - vm_page_prot is readonly */ /* Map the ZERO_PAGE - vm_page_prot is readonly */