Messages in this thread | | | Date | Sat, 10 Jun 2006 13:32:07 +0900 | From | KAMEZAWA Hiroyuki <> | Subject | Re: zoned VM stats: Add NR_ANON |
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On Fri, 9 Jun 2006 11:54:07 -0700 (PDT) Christoph Lameter <clameter@sgi.com> wrote:
> Note that this will change the meaning of the number of mapped pages > reported in /proc/vmstat /proc/meminfo and in the per node statistics. > This may affect user space tools that monitor these counters! > > However, NR_MAPPED then works like NR_DIRTY. It is only valid for > pagecache pages.
> Index: linux-2.6.17-rc6-mm1/mm/rmap.c > =================================================================== > --- linux-2.6.17-rc6-mm1.orig/mm/rmap.c 2006-06-09 10:30:51.768993888 -0700 > +++ linux-2.6.17-rc6-mm1/mm/rmap.c 2006-06-09 11:26:59.389471258 -0700 > @@ -455,7 +455,7 @@ static void __page_set_anon_rmap(struct > * nr_mapped state can be updated without turning off > * interrupts because it is not modified via interrupt. > */ > - __inc_zone_page_state(page, NR_MAPPED); > + __inc_zone_page_state(page, NR_ANON); > } > > /** > @@ -531,7 +531,7 @@ void page_remove_rmap(struct page *page) > */ > if (page_test_and_clear_dirty(page)) > set_page_dirty(page); > - __dec_zone_page_state(page, NR_MAPPED); > + __dec_zone_page_state(page, PageAnon(page) ? NR_ANON : NR_MAPPED); > } > }
Can this accounting catch page migration ? TBD ? Now all coutners are counted per zone, migration should be cared.
-Kame
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