Bug 1402838 - Block memory over-commitment when KSM and ballooning are not being used
Summary: Block memory over-commitment when KSM and ballooning are not being used
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Virtualization Manager
Classification: Red Hat
Component: ovirt-engine
Version: 4.0.5
Hardware: Unspecified
OS: Unspecified
high
high
Target Milestone: ovirt-4.1.2
: ---
Assignee: Jenny Tokar
QA Contact: Shira Maximov
URL:
Whiteboard:
Depends On:
Blocks: 1427844
TreeView+ depends on / blocked
 
Reported: 2016-12-08 12:48 UTC by Doron Fediuck
Modified: 2021-08-30 12:30 UTC (History)
9 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Previously, the Manager allowed setting memory overcommitment without also enabling KSM or ballooning. The scheduler then used the requested optimization, but there was nothing allowing it at the host level. This has now been fixed so that memory overcommitment can only be set when KSM or ballooning is enabled.
Clone Of:
: 1427844 (view as bug list)
Environment:
Last Closed: 2017-05-24 11:22:00 UTC
oVirt Team: SLA
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Issue Tracker RHV-35704 0 None None None 2021-08-30 12:26:08 UTC
Red Hat Knowledge Base (Solution) 2808171 0 None None None 2016-12-14 12:34:16 UTC
Red Hat Product Errata RHEA-2017:1280 0 normal SHIPPED_LIVE Red Hat Virtualization Manager (ovirt-engine) 4.1.2 2017-05-24 15:18:48 UTC
oVirt gerrit 73558 0 master MERGED core: Allow memory over commitment only if ksm or ballooning are available 2017-03-06 13:15:09 UTC
oVirt gerrit 73649 0 ovirt-engine-4.1 MERGED core: Allow memory over commitment only if ksm or ballooning are available 2017-03-09 16:56:03 UTC

Description Doron Fediuck 2016-12-08 12:48:31 UTC 
Description of problem:
Currently we allow memory over-commitment even when KSM and ballooning are not being used. Since there's nothing to create over-commitment, we should not allow this.

Version-Release number of selected component (if applicable):
4.0.5 and below.

How reproducible:


Steps to Reproduce:
1. In edit cluster dialog, go to optimization side tab.
2. Set memory optimization to server load (150%)
3. Disable KSM and Ballooning and approve the settings.

Actual results:
Scheduler will use the requested optimization, although there's nothing
to allow this at the host level.

Expected results:
Disable optimization when ksm and ballooning are unavailable.

Additional info:
Comment 1 Doron Fediuck 2016-12-08 12:54:14 UTC 
This should consider REST and and GUI, so implementation should be at the engine (CanDoAction during editing and creation).
Comment 7 Shira Maximov 2017-03-20 13:52:01 UTC 
can't verify since ovirt 4.1.2 not released yet.
Comment 9 Shira Maximov 2017-03-29 09:03:38 UTC 
can't verify since ovirt 4.1.2 not released yet.
Comment 11 Shira Maximov 2017-04-03 13:30:51 UTC 
can't verify since ovirt 4.1.2 not released yet.
Comment 14 Shira Maximov 2017-04-26 14:08:14 UTC 
verified on : 
The Monitors and USB support 

verification steps:
1. In edit cluster dialog, go to optimization side tab.
2. Set memory optimization to server load (150%)
3. Disable KSM and Ballooning and approve the settings.

Result: 
The Monitors and USB support
Comment 16 errata-xmlrpc 2017-05-24 11:22:00 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://access.redhat.com/errata/RHEA-2017:1280
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