Date: Sun, 28 Jul 2013 01:01:43 +0400
From: Cyrill Gorcunov <gorcunov@gmail.com>
To: Andy Lutomirski <luto@amacapital.net>
Cc: Linux MM <linux-mm@kvack.org>, LKML <linux-kernel@vger.kernel.org>,
        Pavel Emelyanov <xemul@parallels.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Matt Mackall <mpm@selenic.com>,
        Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>,
        Marcelo Tosatti <mtosatti@redhat.com>,
        KOSAKI Motohiro <kosaki.motohiro@gmail.com>,
        Stephen Rothwell <sfr@canb.auug.org.au>
Subject: Re: [PATCH] mm: Save soft-dirty bits on file pages
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On Sat, Jul 27, 2013 at 10:06:01AM -0700, Andy Lutomirski wrote:
> 
> That being said, a MAP_PRIVATE, un-cowed mapping must be clean -- if
> it had been (soft-)dirtied, it would also have been cowed.  So you
> might be okay.

Yas, as far as I know we are either cow'ed or in clean state, thus
either soft-bit set on #pf (and when reclaimed rest in file-pte)
or it remains clean and there is no change we need to track.
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