lkml.org 
[lkml]   [2014]   [Dec]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [RFC V2] mm:add zero_page _mapcount when mapped into user space
On Tue, Dec 02, 2014 at 05:27:36PM +0800, Wang, Yalin wrote:
> This patch add/dec zero_page's _mapcount to make sure
> the mapcount is correct for zero_page,
> so that when read from /proc/kpagecount, zero_page's
> mapcount is also correct, userspace process like procrank can
> calculate PSS correctly.

I don't have specific code path to point to, but I would expect zero page
with non-zero mapcount would cause a problem with rmap.

How do you test the change?

--
Kirill A. Shutemov


\
 
 \ /
  Last update: 2014-12-02 13:01    [W:0.086 / U:0.832 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site