[openstack-dev] [nova] Discussions for ivshmem support in OpenStack Nova
Mooney, Sean K
sean.k.mooney at intel.com
Wed Jul 26 15:42:37 UTC 2017
> -----Original Message-----
> From: Jay Pipes [mailto:jaypipes at gmail.com]
> Sent: Wednesday, July 26, 2017 2:50 PM
> To: OpenStack Development Mailing List (not for usage questions)
> <openstack-dev at lists.openstack.org>; TETSURO NAKAMURA
> <nakamura.tetsuro at lab.ntt.co.jp>; Daniel P. Berrange
> <berrange at redhat.com>; sfinucan at redhat.com; mriedemos at gmail.com
> Cc: 【社内】【ML】srv-apl-arch <srv-apl-arch at lab.ntt.co.jp>
> Subject: Re: [openstack-dev] [nova] Discussions for ivshmem support in
> OpenStack Nova
> On 07/26/2017 03:06 AM, TETSURO NAKAMURA wrote:
> > Hi Nova team,
> > It has been quite a long time since the last discussion, but let me
> > make sure one thing about the thread below.
> > IIUC, Nova is not welcome ivshmem support because it is no longer
> > supported by DPDK+QEMU.
> > But how would you say if it is supported out of DPDK-tree and can be
> > used from the newest qemu version ?
> > We are now developing SPP, a DPDK-based vswitch, and thinking about
> > trying to implement ivshmem support under our SPP code tree if nova
> > (or at first libvirt community) is acceptable for ivshmem
> > Your advice will be very helpful for our decision-making in our
> I think this is a question that the libvirt community would first need
> to weigh in on since Nova is downstream from libvirt -- at least in the
> sense of low-level hypervisor support.
[Mooney, Sean K] well ivshmem was deprecated in dpdk and removed and never supported with hugepages memory instead of posixs
Shared mememy in qemu where it is also deprecated so the first community to approach would be qemu.
I would caution against build new solutions ontop of ivshmem unless you have first measured and demonstrated that vhost-user is not suitable.
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