On Thu 25-04-19 07:55:58, Du, Fan wrote: > >> PMEM is good for frequently read accessed page, e.g. page cache(implicit > >> page > >> request), or user space data base (explicit page request) > >> For now this patch create GFP_SAME_NODE_TYPE for such cases, additional > >> Implementation will be followed up. > > > >Then simply configure that NUMA node as movable and you get these > >allocations for any movable allocation. I am not really convinced a new > >gfp flag is really justified. > > Case 1: frequently write and/or read accessed page deserved to DRAM NUMA balancing > Case 2: frequently read accessed page deserved to PMEM memory reclaim to move those pages to a more distant node (e.g. a PMEM). Btw. none of the above is a static thing you would easily know at the allocation time. Please spare some time reading surrounding discussions - e.g. http://lkml.kernel.org/r/1554955019-29472-1-git-send-email-yang.shi@xxxxxxxxxxxxxxxxx -- Michal Hocko SUSE Labs
