On Wed, 1 Jun 2016 15:46:10 -0400 chintu hetam <rometor...@gmail.com> wrote:
> hugepages doesn't work with VFIO it works with vhost. TBH I don't have a lot of faith in your setup since you haven't really shown how you're allocating 1G hugepages, or even 2M, which many people here are using successfully. Here's a simple test: # cd /sys/kernel/mm/hugepages/hugepages-1048576kB/ # cat nr_hugepages How many do you have available? If less than 32, then: # echo 32 > nr_hugepages Recheck how many are available, you may not be able to get 32 except via boot options. If less, adjust the VM memory size accordingly in the command below. Mount your 1G hugepages: # mkdir /hugepages1G # mount -t hugetlbfs -o pagesize=1G hugetlbfs /hugepages1G Bind your device to vfio-pci: # virsh nodedev-detach pci_0000_aa_06_0 Start a simple VM: # /usr/bin/qemu-kvm -m 32G -mem-path /hugepages1G -nodefaults -monitor stdio -nographic -device vfio-pci,host=aa:06.0 This will give you a (qemu) prompt where you can type 'quit' or ^C to kill it. If this works, then your problem is with configuring your system to use 1G hugepages or with libvirt. Please test. Thanks, Alex _______________________________________________ vfio-users mailing list vfio-users@redhat.com https://www.redhat.com/mailman/listinfo/vfio-users
