Bug 129174

Summary:	There is a bug in the scsi_request_fn function in drivers/scsi_lib.c
Product:	Red Hat Enterprise Linux 3	Reporter:	Heather Conway <conway_heather>
Component:	kernel	Assignee:	Doug Ledford <dledford>
Status:	CLOSED ERRATA	QA Contact:	Brian Brock <bbrock>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	3.0	CC:	petrides, riel
Target Milestone:	---
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2004-09-02 04:32:12 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:

Description Heather Conway 2004-08-04 18:47:29 UTC

Description of problem:
I/O hang encountered during overnight I/O test with induced path 
failures on RHEL 3.0 v2.4.21-15.0.3.EL
I/O load consisted of:
- copy/remove of files to/from three mounted PowerPath devices 
- one write dd process to a fourth pseudo device

Path failures consisted of (interleaving):
- initiator-side port failures
- target-side port failures

It looks as though there is a bug in the scsi_request_fn function in 
drivers/scsi_lib.c around line number 1060. There should be a call to 
blkdev_release request, in the case of init_cmnd failure. 
When the sd driver fails the init_command callout, the scsi driver 
does not release the request, causing a request leak. Eventually, the 
PowerPath code will go to requeue a request in emcp_requeue(), and 
will wait forever. 


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


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Comment 1 Ernie Petrides 2004-08-05 23:20:10 UTC


*** This bug has been marked as a duplicate of 119771 ***

Comment 2 John Flanagan 2004-09-02 04:32:12 UTC

An errata 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 the 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/RHBA-2004-433.html