Bug 662921

Summary: UV: WAR for interrupt-IOPort deadlock [rhel-6.0.z]
Product: Red Hat Enterprise Linux 6 Reporter: RHEL Program Management <pm-rhel>
Component: kernelAssignee: Frantisek Hrbata <fhrbata>
Status: CLOSED ERRATA QA Contact: Red Hat Kernel QE team <kernel-qe>
Severity: urgent Docs Contact:
Priority: urgent    
Version: 6.0CC: dhoward, dwa, fhrbata, gbeshers, gbeshers, jmalanik, loriann, pm-eus, snagar, tee
Target Milestone: rcKeywords: ZStream
Target Release: ---   
Hardware: x86_64   
OS: Linux   
Whiteboard:
Fixed In Version: kernel-2.6.32-71.16.1.el6 Doc Type: Bug Fix
Doc Text:
Prior to this update, running the hwclock --systohc command could halt a running system. This was due to the interrupt transactions being looped back from a local IOH (Input/Output Hub), through the IOH to a local CPU (erroneously), which caused a conflict with I/O port operations and other transactions. With this update, the conflicts are avoided and the system continues to run after executing the hwclock --systohc command.
Story Points: ---
Clone Of: Environment:
Last Closed: 2011-02-22 17:39:07 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Bug Depends On: 659480    
Bug Blocks:    

Description RHEL Program Management 2010-12-14 08:08:08 UTC
This bug has been copied from bug #659480 and has been proposed
to be backported to 6.0 z-stream (EUS).

Comment 7 errata-xmlrpc 2011-02-22 17:39:07 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/RHSA-2011-0283.html

Comment 8 Martin Prpič 2011-02-23 15:11:55 UTC
    Technical note added. If any revisions are required, please edit the "Technical Notes" field
    accordingly. All revisions will be proofread by the Engineering Content Services team.
    
    New Contents:
Prior to this update, running the hwclock --systohc command could halt a running system. This was due to the interrupt transactions being looped back from a local IOH (Input/Output Hub), through the IOH to a local CPU (erroneously), which caused a conflict with I/O port operations and other transactions. With this update, the conflicts are avoided and the system continues to run after executing the hwclock --systohc command.