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authorHugh Dickins <hugh@veritas.com>2005-10-29 18:16:15 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2005-10-29 21:40:39 -0700
commit9e9bef07ce5a342aa6246ebc5c20829d0d5d63d0 (patch)
tree6f7286ebbb2c4b8af7bb04897a64b054c67faa4a
parent86d912f41dca32eca8827f2f878139735e69dc28 (diff)
[PATCH] mm: do_swap_page race major
Small adjustment: do_swap_page should report its !pte_same race as a major fault if it had to read into swap cache, because whatever raced with it will have found page already in cache and reported minor fault. Signed-off-by: Hugh Dickins <hugh@veritas.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--mm/memory.c4
1 files changed, 1 insertions, 3 deletions
diff --git a/mm/memory.c b/mm/memory.c
index bc6296398f8..a25ee1d3e20 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -1728,10 +1728,8 @@ static int do_swap_page(struct mm_struct *mm, struct vm_area_struct *vma,
*/
spin_lock(&mm->page_table_lock);
page_table = pte_offset_map(pmd, address);
- if (unlikely(!pte_same(*page_table, orig_pte))) {
- ret = VM_FAULT_MINOR;
+ if (unlikely(!pte_same(*page_table, orig_pte)))
goto out_nomap;
- }
if (unlikely(!PageUptodate(page))) {
ret = VM_FAULT_SIGBUS;