Bug 715047

Summary:	Calgary: DMA error on CalIOC2 PHB 0x3
Product:	[Fedora] Fedora	Reporter:	Jimmie Mayfield <mayfield+redhat>
Component:	kernel	Assignee:	Kernel Maintainer List <kernel-maint>
Status:	CLOSED INSUFFICIENT_DATA	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	high	Docs Contact:
Priority:	unspecified
Version:	15	CC:	gansalmon, itamar, jonathan, kernel-maint, madhu.chinakonda
Target Milestone:	---
Target Release:	---
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2012-06-06 14:36:58 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:

Description Jimmie Mayfield 2011-06-21 17:32:02 UTC

Description of problem:
Bug #541615 logged against Fedora 12 was closed because F12 reached end-of-life.  I still see this DMA error while trying to install Fedora 15 onto my IBM x3850 M2 system so I'm re-opening...

Hardware: IBM x3850 M2 with integrated LSI SAS 

Version-Release number of selected component (if applicable):


How reproducible:
Every time I try to install

Steps to Reproduce:
1. Obtain x3850 M2 machine
2. Attempt to install Fedora 15 
3. During the installer kernel boot sequence, this error message will appear
  
Actual results:

Kernel reports Calgary-related DMA error during installer kernel boot sequence.  Kernel does not see the LSI SAS controller so no storage devices are found.

Expected results:

Do not expect DMA errors

Additional info:

If iommu=soft is specified to installer kernel, the DMA error does not occur and the LSI SAS controller is found and Fedora installation can proceed.

Comment 1 Chuck Ebbert 2011-06-24 16:17:57 UTC

Does the boot option "pci=nomsi" help?