linux-kernel - Re: [RFC] mm:fix zero_page huge_zero

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Date:	Fri, 12 Dec 2014 13:10:09 +0200
From:	"Kirill A. Shutemov" <kirill@...temov.name>
To:	"Wang, Yalin" <Yalin.Wang@...ymobile.com>
Cc:	'Andrew Morton' <akpm@...ux-foundation.org>,
	'Konstantin Khlebnikov' <koct9i@...il.com>,
	"'linux-kernel@...r.kernel.org'" <linux-kernel@...r.kernel.org>,
	"'linux-mm@...ck.org'" <linux-mm@...ck.org>,
	"'linux-arm-kernel@...ts.infradead.org'" 
	<linux-arm-kernel@...ts.infradead.org>,
	"'n-horiguchi@...jp.nec.com'" <n-horiguchi@...jp.nec.com>,
	"'oleg@...hat.com'" <oleg@...hat.com>,
	"'gorcunov@...nvz.org'" <gorcunov@...nvz.org>,
	"'pfeiner@...gle.com'" <pfeiner@...gle.com>
Subject: Re: [RFC] mm:fix zero_page huge_zero_page rss/pss statistic

On Fri, Dec 12, 2014 at 09:59:15AM +0800, Wang, Yalin wrote:
> > -----Original Message-----
> > From: Kirill A. Shutemov [mailto:kirill@...temov.name]
> > Sent: Wednesday, December 10, 2014 7:06 PM
> > To: Wang, Yalin
> > Cc: 'Andrew Morton'; 'Konstantin Khlebnikov'; 'linux-
> > kernel@...r.kernel.org'; 'linux-mm@...ck.org'; 'linux-arm-
> > kernel@...ts.infradead.org'; 'n-horiguchi@...jp.nec.com'; 'oleg@...hat.com';
> > 'gorcunov@...nvz.org'; 'pfeiner@...gle.com'
> > Subject: Re: [RFC] mm:fix zero_page huge_zero_page rss/pss statistic
> > 
> > On Wed, Dec 10, 2014 at 03:22:21PM +0800, Wang, Yalin wrote:
> > > smaps_pte_entry() doesn't ignore zero_huge_page, but it ignore
> > > zero_page, because vm_normal_page() will ignore it. We remove
> > > vm_normal_page() call, because walk_page_range() have ignore VM_PFNMAP
> > > vma maps, it's safe to just use pfn_valid(), so that we can also
> > > consider zero_page to be a valid page.
> > 
> > We fixed huge zero page accounting in smaps recentely. See mm tree.
> > 
> Hi 
> I can't find the git, could you send me a link?

http://git.cmpxchg.org/cgit.cgi/linux-mmotm.git/

or just take linux-next.

The fix is already in Linus' tree.

-- 
 Kirill A. Shutemov
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