Bug 431442

Summary: PCI passthrough fails after reboot
Product: Red Hat Enterprise Linux 5 Reporter: Andreas Thienemann <athienem>
Component: xenAssignee: Xen Maintainance List <xen-maint>
Status: CLOSED DUPLICATE QA Contact: Virtualization Bugs <virt-bugs>
Severity: low Docs Contact:
Priority: low    
Version: 5.1   
Target Milestone: rc   
Target Release: ---   
Hardware: All   
OS: Linux   
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Fixed In Version: Doc Type: Bug Fix
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Clone Of: Environment:
Last Closed: 2008-02-19 07:31:47 UTC Type: ---
Regression: --- Mount Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description Andreas Thienemann 2008-02-04 15:21:47 UTC 
After rebooting a DomU guest the configured pci passthrough card has vanished:

[root@tyche ~]# uname -a
Linux tyche 2.6.18-53.el5xen #1 SMP Wed Oct 10 17:06:12 EDT 2007 i686 athlon
i386 GNU/Linux
[root@tyche ~]# lspci
00:00.0 Communication controller: Cyclades Corporation Cyclades-Z above first
megabyte (rev 01)
[root@tyche ~]# reboot

Broadcast message from root (pts/1) (Mon Feb  4 16:15:24 2008):

The system is going down for reboot NOW!
[root@tyche ~]# rebootConnection to tyche closed by remote host.
Connection to tyche closed.
[athienem@localhost ~]$ ssh root@tyche
Last login: Mon Feb  4 16:13:14 2008 from nat-pool-str.redhat.com
[root@tyche ~]# lspci
[root@tyche ~]# 

shutting down the guest, waiting and starting it again makes the pci device work
again.
No messages about pci stuff in dmesg.
Comment 1 Andreas Thienemann 2008-02-19 07:31:47 UTC 

*** This bug has been marked as a duplicate of 233801 ***