lkml.org 
[lkml]   [2013]   [Jul]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] mm: Save soft-dirty bits on swapped pages
On Wed, Jul 24, 2013 at 10:55:41PM +0400, Pavel Emelyanov wrote:
> >
> > Well, some part of information already lays in pte (such as 'file' bit,
> > swap entries) so it looks natural i think to work on this level. but
> > letme think if use page struct for that be more convenient...
>
> It hardly will be. Consider we have a page shared between two tasks,
> then first one "touches" it and soft-dirty is put onto his PTE and,
> subsequently, the page itself. The we go and clear sofr-dirty for the
> 2nd task. What should we do with the soft-dirty bit on the page?

Indeed, this won't help. Well then, bippidy-boppidy-boo, our
pants are metaphorically on fire (c)

>
> The soft-dirty thing watches changes in the virtual memory, not in
> the physical one.


\
 
 \ /
  Last update: 2013-07-24 21:21    [W:0.089 / U:1.736 seconds]
©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site