Bug 515694 - RFE: Support disk I/O bandwidth limitation / priority control
RFE: Support disk I/O bandwidth limitation / priority control
Status: CLOSED DUPLICATE of bug 632492
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: libvirt (Show other bugs)
All Linux
low Severity medium
: rc
: ---
Assigned To: Jiri Denemark
Virtualization Bugs
: FutureFeature
: 598438 (view as bug list)
Depends On:
Blocks: 519868 554544 575275 Rhel6.1LibvirtTier2
  Show dependency treegraph
Reported: 2009-08-05 08:25 EDT by Daniel Berrange
Modified: 2011-03-09 04:20 EST (History)
6 users (show)

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Doc Type: Enhancement
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Last Closed: 2010-11-23 16:06:28 EST
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RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

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Description Daniel Berrange 2009-08-05 08:25:24 EDT
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.

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Comment 2 RHEL Product and Program Management 2009-08-05 08:49:56 EDT
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
Comment 3 Daniel Veillard 2009-10-08 08:34:50 EDT
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 

Comment 5 Vivek Goyal 2010-02-16 10:20:51 EST
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.

Comment 6 Daniel Berrange 2010-06-01 08:12:58 EDT
*** Bug 598438 has been marked as a duplicate of this bug. ***
Comment 8 Dave Allan 2010-11-23 16:06:28 EST

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

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