On Fri, Feb 18, 2011 at 12:08:22AM +0900, Minchan Kim wrote:
> This patch adds profile information about invalidated page reclaim.
> It's just for profiling for test so it is never for merging.
>
> Acked-by: Rik van Riel <riel@xxxxxxxxxx>
> Cc: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx>
> Cc: Wu Fengguang <fengguang.wu@xxxxxxxxx>
> Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
> Cc: Nick Piggin <npiggin@xxxxxxxxx>
> Cc: Mel Gorman <mel@xxxxxxxxx>
> Signed-off-by: Minchan Kim <minchan.kim@xxxxxxxxx>
> ---
> include/linux/vmstat.h | 4 ++--
> mm/swap.c | 3 +++
> mm/vmstat.c | 3 +++
> 3 files changed, 8 insertions(+), 2 deletions(-)
>
> diff --git a/include/linux/vmstat.h b/include/linux/vmstat.h
> index 833e676..c38ad95 100644
> --- a/include/linux/vmstat.h
> +++ b/include/linux/vmstat.h
> @@ -30,8 +30,8 @@
>
> enum vm_event_item { PGPGIN, PGPGOUT, PSWPIN, PSWPOUT,
> FOR_ALL_ZONES(PGALLOC),
> - PGFREE, PGACTIVATE, PGDEACTIVATE,
> - PGFAULT, PGMAJFAULT,
> + PGFREE, PGACTIVATE, PGDEACTIVATE, PGINVALIDATE,
> + PGRECLAIM, PGFAULT, PGMAJFAULT,
> FOR_ALL_ZONES(PGREFILL),
> FOR_ALL_ZONES(PGSTEAL),
> FOR_ALL_ZONES(PGSCAN_KSWAPD),
> diff --git a/mm/swap.c b/mm/swap.c
> index 0a33714..980c17b 100644
> --- a/mm/swap.c
> +++ b/mm/swap.c
> @@ -397,6 +397,7 @@ static void lru_deactivate(struct page *page, struct zone *zone)
> * is _really_ small and it's non-critical problem.
> */
> SetPageReclaim(page);
> + __count_vm_event(PGRECLAIM);
> } else {
> /*
> * The page's writeback ends up during pagevec
Is this name potentially misleading?
Pages that are reclaimed are accounted for with _steal. It's not particularly
obvious but that's the name it was given. I'd worry that an administrator that
was not aware of *_steal would read pgreclaim as "pages that were reclaimed"
when this is not necessarily the case.
Is there a better name for this? pginvalidate_deferred
or pginvalidate_delayed maybe?
> @@ -409,6 +410,8 @@ static void lru_deactivate(struct page *page, struct zone *zone)
>
> if (active)
> __count_vm_event(PGDEACTIVATE);
> +
> + __count_vm_event(PGINVALIDATE);
> update_page_reclaim_stat(zone, page, file, 0);
> }
>
> diff --git a/mm/vmstat.c b/mm/vmstat.c
> index 0c3b504..cbe032b 100644
> --- a/mm/vmstat.c
> +++ b/mm/vmstat.c
> @@ -896,6 +896,9 @@ static const char * const vmstat_text[] = {
> "pgactivate",
> "pgdeactivate",
>
> + "pginvalidate",
> + "pgreclaim",
> +
> "pgfault",
> "pgmajfault",
>
> --
> 1.7.1
>
--
Mel Gorman
SUSE Labs
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