On Thu, 21 Nov 2019 19:04:01 +0100 Michal Hocko <mhocko@xxxxxxxxxx> wrote: > On Thu 21-11-19 23:17:52, Pengfei Li wrote: > [...] > > Since I don't currently have multiple node NUMA systems, I would be > > grateful if anyone would like to test this series of patches. > > I didn't really get to think about the actual patchset. From a very > quick glance I am wondering whether we need to optimize as there are > usually only small amount of numa nodes. But I am quite busy so I > cannot really do any claims. Thanks for your comments. I think it's time to modify the zonelist to nodelist because the zonelist is always in node order and the page reclamation is based on node. I will do more performance testing to show that multi-node systems will benefit from this series of patches. > Anyway, you can test this even without NUMA HW. Have a look at > numa=fake option (numa_emu_cmdline). Or you can use kvm/qemu which > provides easy ways to setup a NUMA capable virtual machine. Thanks a lot. I will use the numa=fake option to do more performance testing.
