On Tue 24-11-15 13:36:15, Vlastimil Babka wrote: > CONFIG_PAGE_OWNER attempts to impose negligible runtime overhead when enabled > during compilation, but not actually enabled during runtime by boot param > page_owner=on. This overhead can be further reduced using the static key > mechanism, which this patch does. Is this really worth doing? If we do not have jump labels then the check will be atomic rather than a simple access, so it would be more costly, no? Or am I missing something? -- Michal Hocko 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>