Bug 865665

Summary: host boot fail and when system boots with kernel parameter intel_iommu=on
Product: Red Hat Enterprise Linux 6 Reporter: FuXiangChun <xfu>
Component: kernelAssignee: Don Dutile (Red Hat) <ddutile>
Status: CLOSED DUPLICATE QA Contact: Red Hat Kernel QE team <kernel-qe>
Severity: high Docs Contact:
Priority: unspecified    
Version: 6.4CC: acathrow, alex.williamson, areis, bsarathy, chayang, dyasny, flang, juzhang, knoel, michen, mkenneth, qzhang, shuang, shu, sluo, virt-maint
Target Milestone: rcKeywords: Regression
Target Release: ---   
Hardware: x86_64   
OS: Unspecified   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2012-10-18 02:26:16 UTC Type: Bug
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
host serial console log
none
lspci and dmesg log none

Description FuXiangChun 2012-10-12 05:07:08 UTC
Description of problem:

As subject. and cann't get useful infomation from monitor. I attached host serial console log.

Hit this issue with kernel-2.6.32-328.el6、kernel-2.6.32-320.el6 and kernel-2.6.32-325.el6. 
For kernel-2.6.32-279.el6(GA kernel), It works well and haven't hit this issue. 
Since kvm QE have tested device assignment and don't hit this issue on rhel6.3 GA
so add 'regression' keywords.
Currently, kvm QE want to test 'device assignment' with the latest kernel, because this bug we cann't continue. so add 'blocker' flags.

Version-Release number of selected component (if applicable):
host kernel:
kernel-2.6.32-328.el6
kernel-2.6.32-320.el6
kernel-2.6.32-325.el6. 

How reproducible:
100%

Steps to Reproduce:
1.boot system with  kernel parameter intel_iommu=on
2.
3.
  
Actual results:
boot fail, and monitor cann't get useful infomation.

Expected results:
boot successfully.

Additional info:

Comment 2 Alex Williamson 2012-10-15 14:38:48 UTC
Is this on any system at all or on a particular type of system?  Moving to kernel since this is a host IOMMU bug.

Comment 3 Alex Williamson 2012-10-15 16:15:22 UTC
2.6.32-329.el6.x86_64 boots fine on my system with intel_iommu=on, maybe something x2apic related?

Comment 4 Don Dutile (Red Hat) 2012-10-15 17:52:33 UTC
I don't see attached console log.

Please also provide:
lspci, lspci -vvv, lspci -t output
dmesg log when no intel_iommu=on

Try a boot with 'intel_iommu=strict'

Comment 5 FuXiangChun 2012-10-16 02:21:09 UTC
Created attachment 627914 [details]
host serial console log

Comment 6 FuXiangChun 2012-10-16 02:49:27 UTC
(In reply to comment #4)
> I don't see attached console log.
I attached a console log.

> Please also provide:
> lspci, lspci -vvv, lspci -t output
> dmesg log when no intel_iommu=on
> 
This log file include lspci, lspci -vvv, lspci -t output and dmesg information.

> Try a boot with 'intel_iommu=strict'

host boot successfully and work well.

Comment 7 FuXiangChun 2012-10-16 02:50:53 UTC
Created attachment 627916 [details]
lspci and dmesg log

Comment 8 juzhang 2012-10-18 02:26:16 UTC
Talked to the reporter, the reporter filed the two same( bz865666 and bz865665) bug by mistaking. Close one

*** This bug has been marked as a duplicate of bug 865666 ***