On Thu, Nov 22, 2018 at 11:29:22AM +0100, Michal Hocko wrote: >On Thu 22-11-18 10:15:57, Wei Yang wrote: >> On Thu, Nov 22, 2018 at 06:12:41PM +0800, Wei Yang wrote: >> >During online_pages phase, pgdat->nr_zones will be updated in case this >> >zone is empty. >> > >> >Currently the online_pages phase is protected by the global lock >> >mem_hotplug_begin(), which ensures there is no contention during the >> >update of nr_zones. But this global lock introduces scalability issues. >> > >> >This patch is a preparation for removing the global lock during >> >online_pages phase. Also this patch changes the documentation of >> >node_size_lock to include the protectioin of nr_zones. > >I would just add that the patch moves init_currently_empty_zone under >both zone_span_writelock and pgdat_resize_lock because both the pgdat >state is changed (nr_zones) and the zone's start_pfn > >> > >> >Signed-off-by: Wei Yang <richard.weiyang@xxxxxxxxx> >> >> Missed this, if I am correct. :-) >> >> Acked-by: Michal Hocko <mhocko@xxxxxxxx> > >Yes, thank you. My pleasure :-) >-- >Michal Hocko >SUSE Labs -- Wei Yang Help you, Help me
