On Mon, Oct 07, 2013 at 05:21:48PM +0400, Pavel Emelyanov wrote:
> On 10/04/2013 11:02 PM, Naoya Horiguchi wrote:
> > This flag shows that soft dirty bit is not enabled yet.
> > You can enable it by "echo 4 > /proc/pid/clear_refs."
>
> The comment is not correct. Per-VMA soft-dirty flag means, that
> VMA is "newly created" one and thus represents a new (dirty) are
> in task's VM.
Thanks for the correction. I changed the description.
Naoya
---
From: Naoya Horiguchi <n-horigu...@ah.jp.nec.com>
Date: Fri, 4 Oct 2013 13:42:13 -0400
Subject: [PATCH] smaps: show VM_SOFTDIRTY flag in VmFlags line
This flag shows that the VMA is "newly created" and thus represents
"dirty" in the task's VM.
You can clear it by "echo 4 > /proc/pid/clear_refs."
Signed-off-by: Naoya Horiguchi <n-horigu...@ah.jp.nec.com>
---
fs/proc/task_mmu.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index 7366e9d..c591928 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -561,6 +561,9 @@ static void show_smap_vma_flags(struct seq_file *m, struct
vm_area_struct *vma)
[ilog2(VM_NONLINEAR)] = "nl",
[ilog2(VM_ARCH_1)] = "ar",
[ilog2(VM_DONTDUMP)] = "dd",
+#ifdef CONFIG_MEM_SOFT_DIRTY
+ [ilog2(VM_SOFTDIRTY)] = "sd",
+#endif
[ilog2(VM_MIXEDMAP)] = "mm",
[ilog2(VM_HUGEPAGE)] = "hg",
[ilog2(VM_NOHUGEPAGE)] = "nh",
--
1.8.3.1
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