On Sun, 23 Oct 2011, Gilad Ben-Yossef wrote: > +/* Which CPUs have per cpu pages */ > +cpumask_var_t cpus_with_pcp; > +static DEFINE_PER_CPU(unsigned long, total_cpu_pcp_count); This increases the cache footprint of a hot vm path. Is it possible to do the same than what you did for slub? Run a loop over all zones when draining to check for remaining pcp pages and build the set of cpus needing IPIs temporarily while draining? -- 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/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>