Reviewed: https://review.openstack.org/292499
Committed:
https://git.openstack.org/cgit/openstack/nova/commit/?id=d52ceaf269ae64575c48aa45002aa4fc5cfb2a86
Submitter: Jenkins
Branch: master
commit d52ceaf269ae64575c48aa45002aa4fc5cfb2a86
Author: Sahid Orentino Ferdjaoui <sahid.ferdja...@redhat.com>
Date: Mon Feb 8 09:37:37 2016 -0500
virt: reserved number of mempages on compute host
Users need to mark as reserved some amount of pages for third party
components.
The most common use case for using huge/large pages is NFV. In the
current state of that feature we can't guarantee the necessary amount
of pages to allow OVS-DPDK to run properly on the compute node, which
result in the instance failing to boot on a well selected
compute-node. OVS-DPDK needs 1 GB hugepages reserved. Since Nova does
not take into account that page reserved for OVS-DPDK it results in
the process not being able to acquire the necessary memory which
results in a failed boot.
This commit adds a new option 'reserved_huge_pages' which takes a list
of string format to select on which host NUMA nodes and from which
pagesize we want to reserve a certain amount of pages. It also updates
NUMAPageTopology to contain a reserved memory pages attribute, which
helps compute the available pages size on host for scheduling/claiming
resources.
Change-Id: Ie04d6362a4e99dcb2504698fc831a366ba746b44
Closes-Bug: #1543149
** Changed in: nova
Status: In Progress => Fix Released
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Engineering Team, which is subscribed to OpenStack Compute (nova).
https://bugs.launchpad.net/bugs/1543149
Title:
Reserve host pages on compute nodes
Status in OpenStack Compute (nova):
Fix Released
Bug description:
In some use cases we may want to avoid Nova to use an amount of
hugepages in compute nodes. (example when using ovs-dpdk). We should
to provide an option 'reserved_memory_pages' which provides way to
determine amount of pages we want to reserved for third part
components
To manage notifications about this bug go to:
https://bugs.launchpad.net/nova/+bug/1543149/+subscriptions
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