On Thu, Apr 15, 2010 at 06:21:39PM +0100, Mel Gorman wrote: > shrink_zone() calculculates how many pages it needs to shrink from each > LRU list in a given pass. It uses a number of temporary variables to > work this out that then remain on the stack. This patch splits the > function so that some of the stack variables can be discarded. > > Signed-off-by: Mel Gorman <mel@xxxxxxxxx> > --- > mm/vmscan.c | 29 +++++++++++++++++++---------- > 1 files changed, 19 insertions(+), 10 deletions(-) > > diff --git a/mm/vmscan.c b/mm/vmscan.c > index 1ace7c6..a374879 100644 > --- a/mm/vmscan.c > +++ b/mm/vmscan.c > @@ -1595,19 +1595,14 @@ static unsigned long nr_scan_try_batch(unsigned long nr_to_scan, > return nr; > } > > -/* > - * This is a basic per-zone page freer. Used by both kswapd and direct reclaim. > - */ > -static void shrink_zone(struct zone *zone, struct scan_control *sc) > +/* Calculate how many pages from each LRU list should be scanned */ > +static void calc_scan_trybatch(struct zone *zone, > + struct scan_control *sc, unsigned long *nr) Needs "noinline_for_stack" to stop the compiler re-inlining it. Cheers, Dave. -- Dave Chinner david@xxxxxxxxxxxxx -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>