On 08.05.20 15:39, David Hildenbrand wrote: > On 08.05.20 15:03, Srikar Dronamraju wrote: >> * Michal Hocko <mhocko@xxxxxxxxxx> [2020-05-04 11:37:12]: >> >>>>> >>>>> Have you tested on something else than ppc? Each arch does the NUMA >>>>> setup separately and this is a big mess. E.g. x86 marks even memory less >>>>> nodes (see init_memory_less_node) as online. >>>>> >>>> >>>> while I have predominantly tested on ppc, I did test on X86 with CONFIG_NUMA >>>> enabled/disabled on both single node and multi node machines. >>>> However, I dont have a cpuless/memoryless x86 system. >>> >>> This should be able to emulate inside kvm, I believe. >>> >> >> I did try but somehow not able to get cpuless / memoryless node in a x86 kvm >> guest. > > I use the following > > #! /bin/bash > sudo x86_64-softmmu/qemu-system-x86_64 \ > --enable-kvm \ > -m 4G,maxmem=20G,slots=2 \ > -smp sockets=2,cores=2 \ > -numa node,nodeid=0,cpus=0-1,mem=4G -numa node,nodeid=1,cpus=2-3,mem=0G \ Sorry, this line has to be -numa node,nodeid=0,cpus=0-3,mem=4G -numa node,nodeid=1,mem=0G \ > -kernel /home/dhildenb/git/linux/arch/x86_64/boot/bzImage \ > -append "console=ttyS0 rd.shell rd.luks=0 rd.lvm=0 rd.md=0 rd.dm=0" \ > -initrd /boot/initramfs-5.2.8-200.fc30.x86_64.img \ > -machine pc,nvdimm \ > -nographic \ > -nodefaults \ > -chardev stdio,id=serial \ > -device isa-serial,chardev=serial \ > -chardev socket,id=monitor,path=/var/tmp/monitor,server,nowait \ > -mon chardev=monitor,mode=readline > > to get a cpu-less and memory-less node 1. Never tried with node 0. > -- Thanks, David / dhildenb
