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Bug 514448

Summary: [RHEL5.4 Xen]: Running "xm pci-list-assignable-devices" before modprobing pciback leads to error
Product: Red Hat Enterprise Linux 5 Reporter: Chris Lalancette <clalance>
Component: xenAssignee: Don Dugger <ddugger>
Status: CLOSED ERRATA QA Contact: Virtualization Bugs <virt-bugs>
Severity: medium Docs Contact:
Priority: low    
Version: 5.4CC: ddugger, dexuan.cui, jdenemar, knoel, llim, xen-maint, xin.li, xinsun, xwang
Target Milestone: rc   
Target Release: 5.5   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: xen-3.0.3-101.el5 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2010-03-30 08:58:52 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Attachments:
Description Flags
the patch to fix the bug none

Description Chris Lalancette 2009-07-29 07:09:02 UTC 
Description of problem:
If you run the command:

# xm pci-list-assignable-devices

on a freshly booted dom0, you'll get the error:

ls: /sys/bus/pci/drivers/pciback/: No such file or directory

Unfortunately, it's not very informative.  I think we should either:

1)  modprobe pciback when we start up xend, or, if that is deemed to dangerous,

2)  at least tell the user "you need to modprobe pciback for this to work"
Comment 1 Dexuan Cui 2009-09-11 04:02:33 UTC 
(In reply to comment #0)
> Description of problem:
> If you run the command:
> # xm pci-list-assignable-devices
> on a freshly booted dom0, you'll get the error:
> ls: /sys/bus/pci/drivers/pciback/: No such file or directory
> Unfortunately, it's not very informative.  I think we should either:
> 1)  modprobe pciback when we start up xend, or, if that is deemed to dangerous,
> 2)  at least tell the user "you need to modprobe pciback for this to work"  
I prefer  2). I'll make a small patch for it.
Comment 2 Dexuan Cui 2009-09-11 07:03:39 UTC 
Created attachment 360635 [details]
the patch to fix the bug
Comment 10 errata-xmlrpc 2010-03-30 08:58:52 UTC 
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHBA-2010-0294.html
Comment 11 Paolo Bonzini 2010-04-08 15:48:18 UTC 
This bug was closed during 5.5 development and it's being removed from the internal tracking bugs (which are now for 5.6).