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

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Date:	Fri, 12 Dec 2014 09:59:15 +0800
From:	"Wang, Yalin" <Yalin.Wang@...ymobile.com>
To:	"'Kirill A. Shutemov'" <kirill@...temov.name>
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

> -----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?
Thank you !
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