On Fri, Jul 08, 2016 at 10:34:58AM +0100, Mel Gorman wrote: > The ac_classzone_idx is used as the basis for waking kswapd and that is based > on the preferred zoneref. If the preferred zoneref's first zone is lower > than what is available on other nodes, it's possible that kswapd is woken > on a zone with only higher, but still eligible, zones. As classzone_idx > is strictly adhered to now, it causes a problem because eligible pages > are skipped. > > For example, node 0 has only DMA32 and node 1 has only NORMAL. An allocating > context running on node 0 may wake kswapd on node 1 telling it to skip > all NORMAL pages. > > Signed-off-by: Mel Gorman <mgor...@techsingularity.net> > Acked-by: Hillf Danton <hillf...@alibaba-inc.com>
Acked-by: Johannes Weiner <han...@cmpxchg.org>
