* MinChan Kim <minchan.kim@xxxxxxxxx> [2010-12-14 19:01:26]:
> Hi Balbir,
>
> On Fri, Dec 10, 2010 at 11:31 PM, Balbir Singh
> <balbir@xxxxxxxxxxxxxxxxxx> wrote:
> > Move reusable functionality outside of zone_reclaim.
> > Make zone_reclaim_unmapped_pages modular
> >
> > Signed-off-by: Balbir Singh <balbir@xxxxxxxxxxxxxxxxxx>
> > ---
> > mm/vmscan.c | 35 +++++++++++++++++++++++------------
> > 1 files changed, 23 insertions(+), 12 deletions(-)
> >
> > diff --git a/mm/vmscan.c b/mm/vmscan.c
> > index e841cae..4e2ad05 100644
> > --- a/mm/vmscan.c
> > +++ b/mm/vmscan.c
> > @@ -2815,6 +2815,27 @@ static long zone_pagecache_reclaimable(struct zone *zone)
> > }
> >
> > /*
> > + * Helper function to reclaim unmapped pages, we might add something
> > + * similar to this for slab cache as well. Currently this function
> > + * is shared with __zone_reclaim()
> > + */
> > +static inline void
> > +zone_reclaim_unmapped_pages(struct zone *zone, struct scan_control *sc,
> > + unsigned long nr_pages)
> > +{
> > + int priority;
> > + /*
> > + * Free memory by calling shrink zone with increasing
> > + * priorities until we have enough memory freed.
> > + */
> > + priority = ZONE_RECLAIM_PRIORITY;
> > + do {
> > + shrink_zone(priority, zone, sc);
> > + priority--;
> > + } while (priority >= 0 && sc->nr_reclaimed < nr_pages);
> > +}
>
> As I said previous version, zone_reclaim_unmapped_pages doesn't have
> any functions related to reclaim unmapped pages.
The scan control point has the right arguments for implementing
reclaim of unmapped pages.
> The function name is rather strange.
> It would be better to add scan_control setup in function inner to
> reclaim only unmapped pages.
>
> --
> Kind regards,
> Minchan Kim
--
Three Cheers,
Balbir
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