Bug 605265

Summary: kernel bug in cfq merge logic
Product: Red Hat Enterprise Linux 5 Reporter: Jeff Moyer <jmoyer>
Component: kernelAssignee: Jeff Moyer <jmoyer>
Status: CLOSED ERRATA QA Contact: Hangbin Liu <haliu>
Severity: medium Docs Contact:
Priority: low    
Version: 5.6CC: fge, haliu
Target Milestone: rc   
Target Release: ---   
Hardware: All   
OS: Linux   
URL: https://bugzilla.kernel.org/show_bug.cgi?id=16217
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2011-01-13 21:38:12 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:
Attachments:
Description Flags
reproducer from upstream none

Description Jeff Moyer 2010-06-17 14:26:52 UTC 
Description of problem:
http://lkml.org/lkml/2010/6/17/152

Version-Release number of selected component (if applicable):
rhel 5.5
Comment 1 RHEL Program Management 2010-06-17 14:40:10 UTC 
This request was evaluated by Red Hat Product Management for inclusion in a Red
Hat Enterprise Linux maintenance release.  Product Management has requested
further review of this request by Red Hat Engineering, for potential
inclusion in a Red Hat Enterprise Linux Update release for currently deployed
products.  This request is not yet committed for inclusion in an Update
release.
Comment 2 Jan Tluka 2010-07-12 12:26:01 UTC 
Created attachment 431159 [details]
reproducer from upstream

Attaching reproducer code from upstream. See details on compilation/use in the source.
Comment 5 Jarod Wilson 2010-09-21 21:00:29 UTC 
in kernel-2.6.18-223.el5
You can download this test kernel (or newer) from http://people.redhat.com/jwilson/el5

Detailed testing feedback is always welcomed.
Comment 11 Hangbin Liu 2010-11-30 05:19:34 UTC 
Code reviewed

linux-2.6-block-cfq-no-merges-for-queues-w-no-process-references.patch
is applied in kernel 2.6.18-233.el5 correctly.
Comment 13 errata-xmlrpc 2011-01-13 21:38:12 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-2011-0017.html