Bug 442094

Summary: qla2xxx driver running I/O causes "Kernel: PCI-DMA Out of SW-IOMMU space" error
Product: Red Hat Enterprise Linux 5 Reporter: Aspi Charna <aspi.charna>
Component: kernel-xenAssignee: Xen Maintainance List <xen-maint>
Status: CLOSED DUPLICATE QA Contact: Martin Jenner <mjenner>
Severity: high Docs Contact:
Priority: low    
Version: 5.2CC: andriusb, berthiaume_wayne, coughlan, mbarrow, pan_haifeng, qlogic-redhat-ext
Target Milestone: rc   
Target Release: ---   
Hardware: x86_64   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2008-04-18 16:19:59 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:
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Description Flags
sample of /var/log/messages, output of lspci showing the device in question and output of meminfo none

Description Aspi Charna 2008-04-11 17:38:53 UTC 
- Description of problem:

Heavy I/O activity fails. The /var/log/messages shows the following error:

"PCI-DMA: Out of SW-IOMMU space for 65536 bytes at device 0000:0d:00.0"
"printk: 92 messages suppressed"

This is repeated constantly as long as I/O is run.

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

2.6.18-87.el5xen x86_64

qla2xxx "inbox driver" 8.02.00-K5-rhel5.2-04


- How reproducible:

It is very reproducible. Error occurs every time I/O is run.

- Steps to Reproduce:

1. Attach a Qlogic QLE2562 8G FC Adapter in server. Configure a Multipath    
configuration with EMC storage 
2. Run heavy I/O (large file reads and writes, using Medusa Tools “Pain”)
3. Observe /var/log/messages file
4. The I/O fails with “I/O halt” messages 

  
Actual results:


Expected results:


- Additional info:

similar bug was reported (Bug 219216) and was resolved by an errata kernel in 
Redhat 5.1. 

A sample of /var/log/messages, output of lspci showing the device in question 
and output of meminfo is attached. (IOMMU-ER.txt)
Comment 1 Aspi Charna 2008-04-11 17:38:53 UTC 
Created attachment 302151 [details]
sample of /var/log/messages, output of lspci showing the device in question and output of meminfo
Comment 2 Bill Burns 2008-04-11 18:34:42 UTC 
This should be fixed in the latest kernel build (-89) which will be in snapshot 5.
In the meantime please try the -89 kernel availble here:
http://people.redhat.com/bburns/kernel-xen-2.6.18-89.el5.x86_64.rpm

Thanks
Comment 3 Bill Burns 2008-04-11 18:36:42 UTC 
Probable duplicate of 433554.
Comment 4 Aspi Charna 2008-04-18 15:50:03 UTC 
The new Kernel provided (kernel-xen-2.6.18-89.el5.x86_64.rpm) has resolved the 
issue. There are no error messages related to IOMMU in the messages file.
Comment 5 Bill Burns 2008-04-18 16:19:59 UTC 

*** This bug has been marked as a duplicate of 433554 ***
Comment 6 Bill Burns 2008-04-18 16:20:28 UTC 
Thank! Marked as a duplicate.