On Tue, Dec 04, 2018 at 03:20:13PM +0800, Pingfan Liu wrote: >On Tue, Dec 4, 2018 at 2:54 PM Wei Yang <richard.weiyang@xxxxxxxxx> wrote: >> >> On Tue, Dec 04, 2018 at 11:05:57AM +0800, Pingfan Liu wrote: >> >During my test on some AMD machine, with kexec -l nr_cpus=x option, the >> >kernel failed to bootup, because some node's data struct can not be allocated, >> >e.g, on x86, initialized by init_cpu_to_node()->init_memory_less_node(). But >> >device->numa_node info is used as preferred_nid param for >> >> could we fix the preferred_nid before passed to >> __alloc_pages_nodemask()? >> >Yes, we can doit too, but what is the gain? node_zonelist() is used some places. If we are sure where the problem is, it is not necessary to spread to other places. > >> BTW, I don't catch the function call flow to this point. Would you mind >> giving me some hint? >> >You can track the code along slab_alloc() ->...->__alloc_pages_nodemask() slab_alloc() pass NUMA_NO_NODE down, so I am lost in where the preferred_nid is assigned. > >Thanks, >Pingfan -- Wei Yang Help you, Help me
