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Bug 696889

Summary: emc_clariion error handler panics with multiple failures [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: high Docs Contact:
Priority: urgent    
Version: 6.0CC: agk, bdonahue, berthiaume_wayne, bmarzins, dhoward, dwysocha, eddie.williams, heinzm, jwest, mbroz, msnitzer, pm-eus, prajnoha, prockai, zkabelac
Target Milestone: rcKeywords: ZStream
Target Release: ---   
Hardware: x86_64   
OS: Linux   
Whiteboard:
Fixed In Version: kernel-2.6.32-71.28.1.el6 Doc Type: Bug Fix
Doc Text:
Deleting an SCSI (Small Computer System Interface) device attached to a device handler caused applications running in user space, which were performing I/O operations on that device, to become unresponsive. This was due to the fact that the SCSI device handler's activation did not propagate the SCSI device deletion via an error code and a callback to the Device-Mapper Multipath. With this update, deletion of an SCSI device attached to a device handler is properly handled and no longer causes certain applications to become unresponsive.
 Story Points: ---
Clone Of: Environment:
Last Closed: 2011-05-10 18:11:55 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:
Bug Depends On: 680140    
Bug Blocks:    
Attachments:
Description Flags
6.0.z backport of relevant rhel6.git commits none

Description RHEL Program Management 2011-04-15 07:29:45 UTC 
This bug has been copied from bug #680140 and has been proposed
to be backported to 6.0 z-stream (EUS).
Comment 5 Mike Snitzer 2011-04-19 13:03:06 UTC 
Created attachment 493185 [details]
6.0.z backport of relevant rhel6.git commits

6.0.z backport of rhel6.git commits:
2c95f13 [scsi] scsi_dh: propagate SCSI device deletion
c09b68f [scsi] scsi_dh: fix reference counting in scsi_dh_activate error path
Comment 11 Martin Prpič 2011-05-05 08:54:11 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:
Deleting an SCSI (Small Computer System Interface) device attached to a device handler caused applications running in user space, which were performing I/O operations on that device, to become unresponsive. This was due to the fact that the SCSI device handler's activation did not propagate the SCSI device deletion via an error code and a callback to the Device-Mapper Multipath. With this update, deletion of an SCSI device attached to a device handler is properly handled and no longer causes certain applications to become unresponsive.
Comment 12 errata-xmlrpc 2011-05-10 18:11:55 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-2011-0498.html