[RFC] mm:add KPF_ZERO_PAGE flag for /proc/kpageflags

[Andrew Morton]

On Fri, 5 Dec 2014 18:22:33 +0800 "Wang, Yalin" <Yalin.Wang at sonymobile.com> wrote:

> > -----Original Message-----
> > From: Konstantin Khlebnikov [mailto:koct9i at gmail.com]
> > Sent: Friday, December 05, 2014 5:21 PM
> > To: Wang, Yalin
> > Cc: linux-kernel at vger.kernel.org; linux-mm at kvack.org; linux-arm-
> > kernel at lists.infradead.org; akpm at linux-foundation.org; n-
> > horiguchi at ah.jp.nec.com
> > Subject: Re: [RFC] mm:add KPF_ZERO_PAGE flag for /proc/kpageflags
> > 
> > On Fri, Dec 5, 2014 at 11:57 AM, Wang, Yalin <Yalin.Wang at sonymobile.com>
> > wrote:
> > > This patch add KPF_ZERO_PAGE flag for zero_page, so that userspace
> > > process can notice zero_page from /proc/kpageflags, and then do memory
> > > analysis more accurately.
> > 
> > It would be nice to mark also huge_zero_page. See (completely
> > untested) patch in attachment.
> > 
> Got it,
> Thanks for your patch.

Documentation/vm/pagemap.txt will need updating please.