On Fri, Jul 20, 2018 at 02:05:52PM -0700, David Rientjes wrote: > The huge zero page can be reclaimed under memory pressure and, if it is, > it is attempted to be allocted again with gfp flags that attempt memory > compaction that can become expensive. If we are constantly under memory > pressure, it gets freed and reallocated millions of times always trying to > compact memory both directly and by kicking kcompactd in the background. > > It likely should also be per node.
Have you benchmarked making the non-huge zero page per-node?
