Bug 618720 - qemu-kvm hangs for about 1 min at start up
qemu-kvm hangs for about 1 min at start up
Status: CLOSED DUPLICATE of bug 730128
Product: Fedora
Classification: Fedora
Component: qemu (Show other bugs)
All Linux
low Severity medium
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Assigned To: Fedora Virtualization Maintainers
Fedora Extras Quality Assurance
Depends On:
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Reported: 2010-07-27 11:23 EDT by Richard W.M. Jones
Modified: 2013-01-09 17:57 EST (History)
17 users (show)

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Fixed In Version:
Doc Type: Bug Fix
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Clone Of:
Last Closed: 2012-07-10 08:14:04 EDT
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Description Richard W.M. Jones 2010-07-27 11:23:30 EDT
Description of problem:

Since upgrading the kernel to the latest from Rawhide, qemu-kvm
suddenly hangs for about a minute when it starts up (before apparently
running any part of the guest OS).

The easiest way to see this is to run

  $ libguestfs-test-tool

and observe a very long hang after the command line is printed, and
before the guest appliance boots (at normal speed).

During this time, qemu-kvm consumes 100%, ie. all 4 CPUs.

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

kernel 2.6.35-0.56.rc6.git1

How reproducible:


Steps to Reproduce:
1. time guestfish -a /dev/null run
Actual results:

Takes about 1m24.

Expected results:


Additional info:
Comment 1 Bug Zapper 2010-07-30 08:53:48 EDT
This bug appears to have been reported against 'rawhide' during the Fedora 14 development cycle.
Changing version to '14'.

More information and reason for this action is here:
Comment 2 Richard W.M. Jones 2010-08-03 07:06:20 EDT
Switching back to Rawhide.  Still present in latest kernel-2.6.35-0.57.rc6.git5.fc15.

The issue is fixes itself if I go back to the 2.6.34 kernel.

I also tried upstream qemu compiled from git => same thing.

I also tried stracing qemu and qemu-kvm, but there's nothing that I
can tell that is interesting going on.  Just in a loop doing select and
occasional reads/writes to file descriptors.
Comment 4 Fedora Admin XMLRPC Client 2012-03-15 13:58:36 EDT
This package has changed ownership in the Fedora Package Database.  Reassigning to the new owner of this component.
Comment 5 Cole Robinson 2012-07-10 08:14:04 EDT
Pretty sure this has long since been improved, so closing
Comment 6 Cole Robinson 2012-07-10 09:24:06 EDT

*** This bug has been marked as a duplicate of bug 730128 ***

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