Sahid Orentino Ferdjaoui d52ceaf269 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		2016-05-12 06:32:00 -04:00
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notes	virt: reserved number of mempages on compute host	2016-05-12 06:32:00 -04:00
source	Update reno for stable/mitaka	2016-03-18 19:58:13 +00:00