Bug 524179

Summary: Frequent path failures during I/O on DM multipath devices [rhel-5.2.z]
Product: Red Hat Enterprise Linux 5 Reporter: RHEL Program Management <pm-rhel>
Component: kernelAssignee: Mike Christie <mchristi>
Status: CLOSED ERRATA QA Contact: Red Hat Kernel QE team <kernel-qe>
Severity: urgent Docs Contact:
Priority: urgent    
Version: 5.2CC: agk, bmarzins, bmr, bubrown, casmith, christophe.varoqui, coughlan, cward, dhoward, dwysocha, dzickus, egoggin, james.brown, james.hofmeister, jpirko, junichi.nomura, jwilleford, k.georgiou, kueda, lmb, mbroz, mchristi, pep, phinchman, pm-eus, prockai, qcai, richard.wojdak, senthil-kumar.veluswamy, sghosh, tao, tranlan, vijay.kumar7
Target Milestone: rcKeywords: ZStream
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
: 531002 (view as bug list) Environment:
Last Closed: 2010-02-02 21:02:42 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: 244967    
Bug Blocks: 499522, 531002    
Attachments:
Description Flags
retry dropped frame underrun errors
none
retry dropped frames and fix queue full handling none

Description RHEL Program Management 2009-09-18 08:57:19 UTC
This bug has been copied from bug #244967 and has been proposed
to be backported to 5.2 z-stream (EUS).

Comment 15 Mike Christie 2009-11-09 18:00:55 UTC
Created attachment 368261 [details]
retry dropped frame underrun errors

Could you guys try out this patch. It was made against the 5.2 GA kernel.

It should retry dropped frame underruns (all underruns being reported with DID_ERROR) up to 5 times in the scsi layer like is done in upstream and RHEL 5.4.

Comment 16 Mike Christie 2009-11-13 18:24:21 UTC
Created attachment 369471 [details]
retry dropped frames and fix queue full handling

Please try this patch instead of the other one.

It retries the dropped frame underruns like the other patch, but also fixes the queue full handling which customer also might be hitting.

Comment 31 Jiri Pirko 2009-12-16 19:42:28 UTC
in kernel-2.6.18-92.1.33.el5

Comment 38 errata-xmlrpc 2010-02-02 21:02:42 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-2010-0079.html