On Thu 18-08-16 15:25:40, Linus Torvalds wrote: [...] > So just for testing purposes, you could try changing that > > return alloc_pages(gfp, 0); > > in __page_cache_alloc() into something like > > return alloc_pages_node(cpu_to_node(raw_smp_processor_id())), gfp, 0);
That would break mempolicies AFAICS. Anyway, I might be missing something (the mempolicy kod has a strange sense for aesthetic) but the normal case without any explicit mempolicy should use default_policy which is MPOL_PREFERRED and MPOL_F_LOCAL which means numa_node_id() so the local node. So the above two should do the same thing unless I have missing something. -- Michal Hocko SUSE Labs
