Red Hat Bugzilla – Bug 618720
qemu-kvm hangs for about 1 min at start up
Last modified: 2013-01-09 17:57:06 EST
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
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):
Steps to Reproduce:
1. time guestfish -a /dev/null run
Takes about 1m24.
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:
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.
The root cause is possibly:
See discussion here:
This package has changed ownership in the Fedora Package Database. Reassigning to the new owner of this component.
Pretty sure this has long since been improved, so closing
*** This bug has been marked as a duplicate of bug 730128 ***