Re: [Linaro-mm-sig] [PATCHv21 12/16] mm: trigger page reclaim inalloc_contig_range() to stabilise watermarks

[Michal Nazarewicz]

> On Fri, Feb 10, 2012 at 11:32 AM, Marek Szyprowski
> <m.szyprowski@xxxxxxxxxxx> wrote:
> > @@ -5637,6 +5642,56 @@ static int __alloc_contig_migrate_range(unsigned long start, unsigned long end)
> >        return ret > 0 ? 0 : ret;
> >  }
> >
> > +/*
> > + * Update zone's cma pages counter used for watermark level calculation.
> > + */
> > +static inline void __update_cma_wmark_pages(struct zone *zone, int count)
> > +{
> > +       unsigned long flags;
> > +       spin_lock_irqsave(&zone->lock, flags);
> > +       zone->min_cma_pages += count;
> > +       spin_unlock_irqrestore(&zone->lock, flags);
> > +       setup_per_zone_wmarks();
> > +}
> > +
> > +/*
> > + * Trigger memory pressure bump to reclaim some pages in order to be able to
> > + * allocate 'count' pages in single page units. Does similar work as
> > + *__alloc_pages_slowpath() function.
> > + */
> > +static int __reclaim_pages(struct zone *zone, gfp_t gfp_mask, int count)
> > +{
> > +       enum zone_type high_zoneidx = gfp_zone(gfp_mask);
> > +       struct zonelist *zonelist = node_zonelist(0, gfp_mask);
> > +       int did_some_progress = 0;
> > +       int order = 1;
> > +       unsigned long watermark;
> > +
> > +       /*
> > +        * Increase level of watermarks to force kswapd do his job
> > +        * to stabilise at new watermark level.
> > +        */
> > +       __modify_min_cma_pages(zone, count);

On Mon, 13 Feb 2012 10:57:58 -0800, Robert Nelson <robertcnelson@xxxxxxxxx> wrote:
> Hi Marek,   This ^^^ function doesn't seem to exist in this patchset,
> is it in another set posted to lkml?

This should read __update_cma_wmark_pages().  Sorry for the incorrect patch.

--
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.o. | Liege of Serenely Enlightened Majesty of      o' \,=./ `o
..o | Computer Science,  MichaÅ âmina86â Nazarewicz    (o o)
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