From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pd0-f172.google.com (mail-pd0-f172.google.com [209.85.192.172]) by kanga.kvack.org (Postfix) with ESMTP id 79D786B0039 for ; Mon, 7 Oct 2013 22:55:00 -0400 (EDT) Received: by mail-pd0-f172.google.com with SMTP id z10so7992245pdj.17 for ; Mon, 07 Oct 2013 19:55:00 -0700 (PDT) Date: Mon, 07 Oct 2013 22:54:54 -0400 From: Naoya Horiguchi Message-ID: <1381200894-g4p1jfd3-mutt-n-horiguchi@ah.jp.nec.com> In-Reply-To: <20131007175125.7bb300853d37b6a64eba248d@linux-foundation.org> References: <1380913335-17466-1-git-send-email-n-horiguchi@ah.jp.nec.com> <5252B56C.8030903@parallels.com> <1381155304-2ro6e10t-mutt-n-horiguchi@ah.jp.nec.com> <20131007175125.7bb300853d37b6a64eba248d@linux-foundation.org> Subject: Re: [PATCH 1/2 v2] smaps: show VM_SOFTDIRTY flag in VmFlags line Mime-Version: 1.0 Content-Type: text/plain; charset=iso-2022-jp Content-Transfer-Encoding: 7bit Content-Disposition: inline Sender: owner-linux-mm@kvack.org List-ID: To: Andrew Morton Cc: Pavel Emelyanov , linux-mm@kvack.org, Wu Fengguang , linux-kernel@vger.kernel.org On Mon, Oct 07, 2013 at 05:51:25PM -0700, Andrew Morton wrote: > On Mon, 07 Oct 2013 10:15:04 -0400 Naoya Horiguchi wrote: > > > From: Naoya Horiguchi > > 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 > > --- > > 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 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 Acked-by: Cyrill Gorcunov --- 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 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org