This is a note to let you know that I've just added the patch titled
mm: /proc/pid/pagemap: inspect _PAGE_SOFT_DIRTY only on present pages
to the 3.11-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
mm-proc-pid-pagemap-inspect-_page_soft_dirty-only-on-present-pages.patch
and it can be found in the queue-3.11 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From e9cdd6e771580e6ff872e5c64e8b766972c7d1bc Mon Sep 17 00:00:00 2001
From: Cyrill Gorcunov <gorcunov@xxxxxxxxx>
Date: Wed, 16 Oct 2013 13:46:53 -0700
Subject: mm: /proc/pid/pagemap: inspect _PAGE_SOFT_DIRTY only on present pages
From: Cyrill Gorcunov <gorcunov@xxxxxxxxx>
commit e9cdd6e771580e6ff872e5c64e8b766972c7d1bc upstream.
If a page we are inspecting is in swap we may occasionally report it as
having soft dirty bit (even if it is clean). The pte_soft_dirty helper
should be called on present pte only.
Signed-off-by: Cyrill Gorcunov <gorcunov@xxxxxxxxxx>
Cc: Pavel Emelyanov <xemul@xxxxxxxxxxxxx>
Cc: Andy Lutomirski <luto@xxxxxxxxxxxxxx>
Cc: Matt Mackall <mpm@xxxxxxxxxxx>
Cc: Xiao Guangrong <xiaoguangrong@xxxxxxxxxxxxxxxxxx>
Cc: Marcelo Tosatti <mtosatti@xxxxxxxxxx>
Cc: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxx>
Cc: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@xxxxxxxxxxxxxxxxxx>
Reviewed-by: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx>
Cc: Mel Gorman <mel@xxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/proc/task_mmu.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -938,6 +938,8 @@ static void pte_to_pagemap_entry(pagemap
frame = pte_pfn(pte);
flags = PM_PRESENT;
page = vm_normal_page(vma, addr, pte);
+ if (pte_soft_dirty(pte))
+ flags2 |= __PM_SOFT_DIRTY;
} else if (is_swap_pte(pte)) {
swp_entry_t entry;
if (pte_swp_soft_dirty(pte))
@@ -955,8 +957,6 @@ static void pte_to_pagemap_entry(pagemap
if (page && !PageAnon(page))
flags |= PM_FILE;
- if (pte_soft_dirty(pte))
- flags2 |= __PM_SOFT_DIRTY;
*pme = make_pme(PM_PFRAME(frame) | PM_STATUS2(pm->v2, flags2) | flags);
}
Patches currently in stable-queue which might be from gorcunov@xxxxxxxxx are
queue-3.11/mm-proc-pid-pagemap-inspect-_page_soft_dirty-only-on-present-pages.patch
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