Bug 1373613

Summary: Backport Nova "AIO mode for disk devices" patches to Liberty (RHOS-8) from Mitaka (RHOS-9)
Product: Red Hat OpenStack Reporter: David Hill <dhill>
Component: openstack-novaAssignee: Diana Clarke <dclarke>
Status: CLOSED ERRATA QA Contact: Gabriel Szasz <gszasz>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: 8.0 (Liberty)CC: aathomas, awaugama, berrange, dasmith, dcadzow, dclarke, dhill, eglynn, kchamart, mburns, sbauza, sferdjao, sgordon, srevivo, vromanso
Target Milestone: asyncKeywords: FeatureBackport, ZStream
Target Release: 8.0 (Liberty)   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: openstack-nova-12.0.4-15.el7ost Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2016-11-14 19:56:53 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:

Description David Hill 2016-09-06 17:53:14 UTC 
Description of problem:
Would it be possible to backport the following patches from Liberty to Mitaka?

https://blueprints.launchpad.net/nova/+spec/libvirt-aio-mode


Version-Release number of selected component (if applicable):


How reproducible:
When trying to set aio=native in RHOSP 8, it's no longer setting aio=native as per the previously merged patches that supported this :

[workarounds]
# Specific IO policies to use for different disk types
# e.g: file=threads,network=native (list value)
# This should not be required when nova auto selects the
# most appropriate (http://bugzilla.redhat.com/865337),
# or likewise qemu (http://bugzilla.redhat.com/1175440)
#rhosp_disk_io_policies=
rhosp_disk_io_policies=file=threads,network=native

Steps to Reproduce:
1. Install RHOSP 8.0
2. Try to set aio=native on disks to tweak performances 
3.

Actual results:
No longer supported

Expected results:
Should be supported

Additional info:
This looks like a regression.   There's the libvirt option disk_cachemodes but it doesn't set the aio=native mode we need.
Comment 10 David Hill 2016-10-27 15:40:44 UTC 
This patch solves our issue and confirmed by the customer.
Comment 11 Sahid Ferdjaoui 2016-11-07 12:50:44 UTC 
*** Bug 1356719 has been marked as a duplicate of this bug. ***
Comment 13 errata-xmlrpc 2016-11-14 19:56:53 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHBA-2016-2713.html