On Sun, Mar 17, 2013 at 07:55:54AM -0700, Andi Kleen wrote: > Mel Gorman <[email protected]> writes: > > > + > > + /* > > + * We put equal pressure on every zone, unless one zone has way too > > + * many pages free already. The "too many pages" is defined as the > > + * high wmark plus a "gap" where the gap is either the low > > + * watermark or 1% of the zone, whichever is smaller. > > + */ > > + balance_gap = min(low_wmark_pages(zone), > > + (zone->managed_pages + KSWAPD_ZONE_BALANCE_GAP_RATIO-1) / > > + KSWAPD_ZONE_BALANCE_GAP_RATIO); > > Don't like those hard coded tunables. 1% of a 512GB node can be still > quite a lot. Shouldn't the low watermark be enough? >
1% of 512G would be lot but in that case, it'll use the low watermark as the balance gap. -- Mel Gorman SUSE Labs -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
