linux-kernel - Re: How movable is zone movable?

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Date:	Mon, 13 Apr 2009 08:10:58 -0400
From:	Ed Tomlinson <edt@....ca>
To:	Mel Gorman <mel@....ul.ie>
Cc:	linux-kernel@...r.kernel.org, Nick Piggin <npiggin@...e.de>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Subject: Re: How movable is zone movable?

On Monday 13 April 2009 06:04:40 you wrote:
> On Mon, Apr 13, 2009 at 10:59:25AM +0100, Mel Gorman wrote:
> > > # huge_pages with movablecore set to 3G
> > 
> > How big did you make the movable zone and what is the hugepage size?
> 
> Scratch that question, I missed you said it was 3G. Are pages being
> mlocked()?

Looks like there are mlocked pages.  What stopped the patches to allow these pages
to be migrated?

TIA
Ed

(from /proc/zoneinfo)
Node 0, zone  Movable
  pages free     35321
        min      858
        low      1072
        high     1287
        scanned  0 (aa: 2 ia: 0 af: 0 if: 0)
        spanned  786432
        present  775680
    nr_free_pages 35321
    nr_inactive_anon 29383
    nr_active_anon 82452
    nr_inactive_file 376826
    nr_active_file 219586
    nr_unevictable 816
    nr_mlock     816
    nr_anon_pages 110648
    nr_mapped    28364
    nr_file_pages 598492
    nr_dirty     131
    nr_writeback 0
    nr_slab_reclaimable 0
    nr_slab_unreclaimable 0
    nr_page_table_pages 0
    nr_unstable  0
    nr_bounce    0
    nr_vmscan_write 95
    nr_writeback_temp 0
        protection: (0, 0, 0, 0)
  pagesets
    cpu: 0
              count: 7
              high:  186
              batch: 31
  vm stats threshold: 24
    cpu: 1
              count: 7
              high:  186
              batch: 31
  vm stats threshold: 24
    cpu: 2
              count: 14
              high:  186
              batch: 31
  vm stats threshold: 24
  all_unreclaimable: 0
  prev_priority:     12
  start_pfn:         1441792
  inactive_ratio:    4
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