On Mon, Oct 07, 2013 at 05:51:25PM -0700, Andrew Morton wrote:
> On Mon, 07 Oct 2013 10:15:04 -0400 Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx> wrote:
>
> > From: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx>
> > 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-horiguchi@xxxxxxxxxxxxx>
> > ---
> > 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",
>
> Documentation/filesystems/proc.txt needs updating, please.
OK. Here's the revised one.
---
From: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx>
Date: Mon, 7 Oct 2013 22:52:00 -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-horiguchi@xxxxxxxxxxxxx>
Acked-by: Cyrill Gorcunov <gorcunov@xxxxxxxxxx>
---
Documentation/filesystems/proc.txt | 1 +
fs/proc/task_mmu.c | 3 +++
2 files changed, 4 insertions(+)
diff --git a/Documentation/filesystems/proc.txt b/Documentation/filesystems/proc.txt
index 823c95f..22d89aa3 100644
--- a/Documentation/filesystems/proc.txt
+++ b/Documentation/filesystems/proc.txt
@@ -460,6 +460,7 @@ flags associated with the particular virtual memory area in two letter encoded
nl - non-linear mapping
ar - architecture specific flag
dd - do not include area into core dump
+ sd - soft-dirty flag
mm - mixed map area
hg - huge page advise flag
nh - no-huge page advise flag
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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