Red Hat Bugzilla – Bug 747619
Host PCI device's original states are not honored anymore after deamon is restarted
Last modified: 2012-06-20 02:35:26 EDT
Description of problem: To support "managed" mode of host PCI device, we record the original states (unbind_from_stub, remove_slot, and reprobe) so that could reattach the device to host with original driver. But there is no XML for theses attrs, and thus after daemon is restarted, we lose the original states. It's easy to reproduce: 1) virsh start domain 2) virsh attach-device dom hostpci.xml (in 'managed' mode) 3) service libvirtd restart 4) virsh destroy domain You will see the device won't be bound to the original driver if there was one. Version-Release number of selected component (if applicable): How reproducible: Steps to Reproduce: 1. 2. 3. Actual results: Expected results: Additional info:
Osier, if virsh attach-device support --persistent option, whether this issue can be resolved?
I can reproduce this issue on rhel6.2 with libvirt-0.9.4-14.el6_x86_64, although managed mode is yes, the device can't be returned to host after destroying or shutting down the guest.
patch committed to upstream.
commit d84b36263c5c54df8ebfaebbe099afec78c14fac Author: Osier Yang <jyang@redhat.com> Date: Thu Oct 20 17:50:10 2011 +0800 qemu: Restore the original states of PCI device when restarting daemon To support "managed" mode of host PCI device, we record the original states (unbind_from_stub, remove_slot, and reprobe) so that could reattach the device to host with original driver. But there is no XML for theses attrs, and thus after daemon is restarted, we lose the original states. It's easy to reproduce: 1) virsh start domain 2) virsh attach-device dom hostpci.xml (in 'managed' mode) 3) service libvirtd restart 4) virsh destroy domain You will see the device won't be bound to the original driver if there was one. ......
verify pass on libvirt-0.9.9-1.el6.x86_64 kernel-2.6.32-225.el6.x86_64 qemu-kvm-0.12.1.2-2.213.el6.x86_64 After restart libvirtd and destroy guest, the pci device will return to host
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Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. http://rhn.redhat.com/errata/RHSA-2012-0748.html