On Thu, 6 Jul 2017, Roman Gushchin wrote: > +#define PGALLOC_EVENTS_SIZE (MAX_NR_ZONES * MAX_ORDER) > +#define PGALLOC_EVENTS_CUT_SIZE (MAX_NR_ZONES * (MAX_ORDER - 1)) > +#define PGALLOC_FIRST_ZONE (PGALLOC_NORMAL - ZONE_NORMAL) You are significantly increasing the per cpu counters (ZONES * MAX_ORDER * cpus!!!). This will increase the cache footprint of critical functions significantly and thus lead to regressions. Typically counters for zones are placed in the zone structures but you would also significantly increase the per zone counters ... -- 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>
