On Mon, Feb 06, 2017 at 07:16:46PM -0500, Shantanu Goel wrote: > > However, note that there is a slight risk that kswapd will sleep for a > > short interval early due to a very small zone such as ZONE_DMA. If this > > is a general problem then it'll manifest as less kswapd reclaim and more > > direct reclaim. If it turns out this is an issue then a revert will not > > be the right fix. Instead, all the checks for zone_balance will need to > > account for the only balanced zone being a tiny percentage of memory in > > the node. > > > > I see your point. Perhaps we can introduce a constraint that > ensures the balanced zones constitute say 1/4 or 1/2 of > memory in the classzone? I believe there used to be such > a constraint at one time for higher order allocations. > There was but it was fairly complex and I'd rather avoid it if at all possible and certainly not without data backing it up. -- Mel Gorman SUSE Labs -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>
