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Bug 611232 - -rtc cmdline changes
-rtc cmdline changes
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: libvirt (Show other bugs)
All Linux
low Severity medium
: rc
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Assigned To: Daniel Veillard
Virtualization Bugs
Depends On:
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Reported: 2010-07-04 07:53 EDT by Dor Laor
Modified: 2013-01-09 16:19 EST (History)
5 users (show)

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Fixed In Version:
Doc Type: Bug Fix
Doc Text:
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Clone Of:
Last Closed: 2010-07-05 06:31:38 EDT
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RHEL 7.3 requirements from Atomic Host:
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Description Dor Laor 2010-07-04 07:53:57 EDT
Description of problem:

Libvirt should pass this cmdline:
'-rtc base=utc,clock=host,driftfix=slew'
instead of only -etc base=utc.

Libvirt should also abundant the old -rtc-td-hack
Comment 1 Daniel Berrange 2010-07-05 06:31:38 EDT
Libvirt won't hardcode time keeping options, but it will pass whatever command line is configured for the guest. To get that particular set of options you need to configure

  <clock offset='utc'>
    <timer name='rtc' tickpolicy='catchup' track='wall'/>

For compatibility with old QEMU, libvirt will use -rtc-td-hack if it is present, but -rtc is not present.

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