** Also affects: ubuntu-power-systems
Importance: Undecided
Status: New
** Changed in: ubuntu-power-systems
Assignee: (unassigned) => Canonical Kernel Team (canonical-kernel-team)
** Changed in: ubuntu-power-systems
Importance: Undecided => High
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https://bugs.launchpad.net/bugs/1709894
Title:
Support for multiple PHBs in pseries virtual machines
Status in The Ubuntu-power-systems project:
New
Status in linux package in Ubuntu:
New
Bug description:
== Comment: #0 - Leonardo Augusto Guimaraes Garcia <[email protected]> -
2017-07-27 13:24:28 ==
Power servers can have multiple PCI Host Bridges (PHBs), different from x86,
where it is rare to have multiple PHBs.
Multiple PHBs are important on Power virtual machines because it
allows EEH to work correctly for multiple devices. If a virtual
machine has only one vPHB and an EEH occurs to an adapter passed
through to the virtual machine and attached to that vPHB, all other
adapters connected to the same vPHB will be reset because of the EEH
recovery routine.
With multiple vPHBs we can attach one device per PHB and EEH will work
independently without problems for each adapter.
This feature has already been integrated upstream and will be
available with libvirt 3.6.0.
QEMU already allows multiple PHBs. This feature is to add this support
into libvirt.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu-power-systems/+bug/1709894/+subscriptions
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