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Have you enabled huge page on the host level?
Do you have enough vn.nr_hugepages?
As per your requirements, you need a host with 512 hugepage (1G/2M).
Check your host's /etc/sysctl.conf file and see vm.nr_hugepages value.

On Aug 25, 2016 1:15 PM, "zhi" <changzhi1990 at gmail.com> wrote:

> hi, all
>
>     I plan to create VM with huge page. And I created a new flavor like
> this:
>
> $ nova flavor-show ed8dccd2-adbe-44ee-9e4f-391d045d3653
> +----------------------------+------------------------------
> ------------------------------------------------------------
> -------------------+
> | Property                   | Value
>                                                                 |
> +----------------------------+------------------------------
> ------------------------------------------------------------
> -------------------+
> | OS-FLV-DISABLED:disabled   | False
>                                                                 |
> | OS-FLV-EXT-DATA:ephemeral  | 0
>                                                                 |
> | disk                       | 30
>                                                                  |
> | extra_specs                | {"aggregate_instance_extra_specs:pinned":
> "true", "hw:cpu_policy": "dedicated", "hw:mem_page_size": "2048"} |
> | id                         | ed8dccd2-adbe-44ee-9e4f-391d045d3653
>                                                                  |
> | name                       | m1.vm_2
>                                                                 |
> | os-flavor-access:is_public | True
>                                                                  |
> | ram                        | 1024
>                                                                  |
> | rxtx_factor                | 1.0
>                                                                 |
> | swap                       |
>                                                                 |
> | vcpus                      | 4
>                                                                 |
> +----------------------------+------------------------------
> ------------------------------------------------------------
> -------------------+
>
> Then I create a VM by using this flavor and creating fail. The error
> message is :
> "
> {"message": "Build of instance ada7ac22-1052-44e1-b4a5-c21221dbab87 was
> re-scheduled: Insufficient compute resources: Requested instance NUMA
> topology cannot fit the given
>  host NUMA topology.", "code": 500, "details": "  File
> \"/usr/lib/python2.7/site-packages/nova/compute/manager.py\", line 1905,
> in _do_build_and_run_instance
> "
>
> And, my compute node's numa info is:
>
> $ numactl --hardware
> available: 2 nodes (0-1)
> node 0 cpus: 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38
> node 0 size: 32543 MB
> node 0 free: 28307 MB
> node 1 cpus: 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39
> node 1 size: 32768 MB
> node 1 free: 29970 MB
> node distances:
> node   0   1
>   0:  10  21
>   1:  21  10
>
> Qemu version is "QEMU emulator version 2.1.2
> (qemu-kvm-ev-2.1.2-23.el7.1)". And libvirtd version is "1.2.17".
>
>
> Did anyone meet the same error like me?
>
>
>
> B.R.
>
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