Bug 648603 (LibvirtNetworkParms)

Summary:	Expose QEMU network controls
Product:	Red Hat Enterprise Linux 6	Reporter:	Glauber Costa <gcosta>
Component:	libvirt	Assignee:	Michal Privoznik <mprivozn>
Status:	CLOSED WONTFIX	QA Contact:	Virtualization Bugs <virt-bugs>
Severity:	medium	Docs Contact:
Priority:	low
Version:	6.0	CC:	dallan, eblake, laine, mst, xen-maint
Target Milestone:	rc
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2011-11-23 15:16:10 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	644849

Description Glauber Costa 2010-11-01 17:50:02 UTC

QEMU networking has some knobs that would be interesting to be in control of.

Those include tx mitigation on/off, number of vhost threads, etc.
Would be good to have a supported libvirt way to pass them to qemu.

Comment 2 Dave Allan 2011-01-05 19:49:44 UTC

Some related work that is settling the upstream debate is being done upstream this week.  These knobs would slot into that work nicely.

Comment 5 Laine Stump 2011-01-25 19:25:10 UTC

(The upstream work for adding the sndbuf tunable (which is generic to all tap-based network devices) is detailed in Bug 665293. The work for adding a selection of vhost vs. userland backend (which is specific to virtio) is in Bug 643050.)

Where are these other knobs documented? I see nothing in the qemu -help output (of 0.13.0, at least).

Comment 6 Michal Privoznik 2011-02-03 14:20:46 UTC

so, are there any other network controls you want to have exposed? Can you please enumerate them?

and as laine pointed out - could you please link docs where are these knobs documented? i've tried 0.14.0-rc0 and the changes are also only minor.