diff options
| author | Balazs Gibizer <gibi@redhat.com> | 2022-08-28 19:20:05 +0200 |
|---|---|---|
| committer | Balazs Gibizer <gibi@redhat.com> | 2023-01-05 17:25:27 +0100 |
| commit | 2cb1eedeafbfe0d99f5a7dcdf9c9ad02e735c6df (patch) | |
| tree | 0639932011d9ef71b5d3227b55f04387aedfbad8 /doc/source | |
| parent | 2cf58d3d1e0a21363b0b8b2fcb7c568b4ee5e428 (diff) | |
| download | nova-2cb1eedeafbfe0d99f5a7dcdf9c9ad02e735c6df.tar.gz | |
Allow enabling PCI scheduling in Placement
A new configuration option [filter_scheduler]pci_in_placement is added
that allows enabling the scheduler logic for PCI device handling in
Placement for flavor based PCI requests.
blueprint: pci-device-tracking-in-placement
Change-Id: I5ddf6d3cdc7e05cc4914b9b1e762fa02a5c7c550
Diffstat (limited to 'doc/source')
| -rw-r--r-- | doc/source/admin/pci-passthrough.rst | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/doc/source/admin/pci-passthrough.rst b/doc/source/admin/pci-passthrough.rst index 46d1604214..09a963603d 100644 --- a/doc/source/admin/pci-passthrough.rst +++ b/doc/source/admin/pci-passthrough.rst @@ -65,6 +65,10 @@ capabilities. :oslo.config:option:`pci.device_spec` configuration that uses the ``devname`` field. +.. versionchanged:: 27.0.0 (2023.1 Antelope): + Nova provides Placement based scheduling support for servers with flavor + based PCI requests. This support is disable by default. + Enabling PCI passthrough ------------------------ @@ -442,6 +446,24 @@ removed and VFs from the same PF is configured (or vice versa) then nova-compute will refuse to start as it would create a situation where both the PF and its VFs are made available for consumption. +Since nova 27.0.0 (2023.1 Antelope) scheduling and allocation of PCI devices +in Placement can also be enabled via +:oslo.config:option:`filter_scheduler.pci_in_placement`. Please note that this +should only be enabled after all the computes in the system is configured to +report PCI inventory in Placement via +enabling :oslo.config:option:`pci.report_in_placement`. In Antelope flavor +based PCI requests are support but Neutron port base PCI requests are not +handled in Placement. + +If you are upgrading from an earlier version with already existing servers with +PCI usage then you must enable :oslo.config:option:`pci.report_in_placement` +first on all your computes having PCI allocations and then restart the +nova-compute service, before you enable +:oslo.config:option:`filter_scheduler.pci_in_placement`. The compute service +will heal the missing PCI allocation in placement during startup and will +continue healing missing allocations for future servers until the scheduling +support is enabled. + If a flavor requests multiple ``type-VF`` devices via :nova:extra-spec:`pci_passthrough:alias` then it is important to consider the value of :nova:extra-spec:`group_policy` as well. The value ``none`` |