The patch titled
smaps: use ptep_test_and_clear_young
has been added to the -mm tree. Its filename is
smaps-use-ptep_test_and_clear_young.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: smaps: use ptep_test_and_clear_young
From: David Rientjes <rientjes@xxxxxxxxxx>
Use arch-specified ptep_test_and_clear_young() to clear the pte accessed
bits for /proc/pid/clear_refs. This avoids a race condition if a pte is
modified between pte_mkold() and set_pte_at().
Cc: Hugh Dickins <hugh@xxxxxxxxxxx>
Signed-off-by: David Rientjes <rientjes@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/proc/task_mmu.c | 5 +----
1 file changed, 1 insertion(+), 4 deletions(-)
diff -puN fs/proc/task_mmu.c~smaps-use-ptep_test_and_clear_young fs/proc/task_mmu.c
--- a/fs/proc/task_mmu.c~smaps-use-ptep_test_and_clear_young
+++ a/fs/proc/task_mmu.c
@@ -273,10 +273,7 @@ static void clear_refs_pte_range(struct
continue;
/* Clear accessed and referenced bits. */
- if (pte_young(ptent)) {
- ptent = pte_mkold(ptent);
- set_pte_at(vma->vm_mm, addr, pte, ptent);
- }
+ ptep_test_and_clear_young(vma, addr, pte);
ClearPageReferenced(page);
}
pte_unmap_unlock(pte - 1, ptl);
_
Patches currently in -mm which might be from rientjes@xxxxxxxxxx are
x86_64-configurable-fake-numa-node-sizes.patch
x86_64-configurable-fake-numa-node-sizes-fix.patch
x86_64-split-remaining-fake-nodes-equally.patch
x86_64-fixed-size-remaining-fake-nodes.patch
x86_64-map-fake-nodes-to-real-nodes.patch
x86_64-disable-alien-cache-for-fake-numa.patch
x86_64-export-physnode-mapping-to-userspace.patch
x86_64-fake-numa-for-cpusets-document.patch
i386-add-ptep_test_and_clear_dirtyyoung.patch
smaps-extract-pmd-walker-from-smaps-code.patch
smaps-add-pages-referenced-count-to-smaps.patch
smaps-add-clear_refs-file-to-clear-reference.patch
smaps-add-clear_refs-file-to-clear-reference-fix.patch
smaps-add-clear_refs-file-to-clear-reference-fix-fix.patch
smaps-add-clear_refs-file-to-clear-reference-fix-fix-2.patch
smaps-add-clear_refs-file-to-clear-reference-cleanup.patch
smaps-use-ptep_test_and_clear_young.patch
smaps-add-clear_refs-file-to-clear-reference-docs.patch
-
To unsubscribe from this list: send the line "unsubscribe mm-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
