Bug 515694

Summary:	RFE: Support disk I/O bandwidth limitation / priority control
Product:	Red Hat Enterprise Linux 6	Reporter:	Daniel Berrangé <berrange>
Component:	libvirt	Assignee:	Jiri Denemark <jdenemar>
Status:	CLOSED DUPLICATE	QA Contact:	Virtualization Bugs <virt-bugs>
Severity:	medium	Docs Contact:
Priority:	low
Version:	6.0	CC:	dallan, gozen, lwang, vgoyal, xen-maint, yoyzhang
Target Milestone:	rc	Keywords:	FutureFeature
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Enhancement
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2010-11-23 21:06:28 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:	519868, 554544, 575275, 628871

Description Daniel Berrangé 2009-08-05 12:25:24 UTC

Description of problem:
There needs to be a mechanism to enforce disk I/O bandwidth for guest virtual machines. For the QEMU driver, this could be done using the CLONE_IO flag & io priority schedular tunable. CGroups may also soon gain a block IO controller that could be used.

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


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Comment 2 RHEL Program Management 2009-08-05 12:49:56 UTC

This request was evaluated by Red Hat Product Management for inclusion in a Red
Hat Enterprise Linux major release.  Product Management has requested further
review of this request by Red Hat Engineering, for potential inclusion in a Red
Hat Enterprise Linux Major release.  This request is not yet committed for
inclusion.

Comment 3 Daniel Veillard 2009-10-08 12:34:50 UTC

No work has been done upstream about this, and this requires a new API and
much testing, this is IMHO really at risk at this point so Cond NACK on 
Upstream,

Daniel

Comment 5 Vivek Goyal 2010-02-16 15:20:51 UTC

The basic weight based proportional BW division IO controller (blkio) patches went upstream (available in current 2.6.33-rc8) and are also available in RHEL6 kernel. It would be good if we can have some kind of support for it in libvirt.

A quick HOWTO is available in kernel sources. Documentation/cgroups/blkio-controller.txt.

Alternatively, one can find it here.

http://www.linuxhq.com/kernel/v2.6/32-git15/Documentation/cgroups/blkio-controller.txt

Comment 6 Daniel Berrangé 2010-06-01 12:12:58 UTC

*** Bug 598438 has been marked as a duplicate of this bug. ***

Comment 8 Dave Allan 2010-11-23 21:06:28 UTC


*** This bug has been marked as a duplicate of bug 632492 ***