Bug 115427

Summary: Massive workload combined with ESS flashcopy leading to I/O hang
Product: Red Hat Enterprise Linux 3 Reporter: Ingolf Salm <salm>
Component: kernelAssignee: Pete Zaitcev <zaitcev>
Status: CLOSED ERRATA QA Contact: Brock Organ <borgan>
Severity: high Docs Contact:
Priority: high    
Version: 3.0CC: bjohnson, petrides, riel
Target Milestone: ---   
Target Release: ---   
Hardware: s390   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
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Clone Of: Environment:
Last Closed: 2004-09-02 04:31:05 UTC Type: ---
Regression: --- Mount Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description Flags
path for device qualification problem none

Description Ingolf Salm 2004-02-12 12:42:52 UTC 
Description of problem:
Symptom:     FlashCopy IO hang
Problem:     State change interrupt handler checks only first request 
in cqr-queue, but in case the fastpath for start_IO was successful, 
it might happen that the second request is long busy.
Solution:    Check the whole cqr-queue for long busy.
LTC bugzilla: 4676
Comment 1 Ingolf Salm 2004-02-12 12:48:14 UTC 
fix is necessary for SCSI device qualification. In last status 
meeting Bob Johnson and Hans-Georg Markgraf (IBM) agreed that it need 
to be fixed in RHEL 3 Update 2.
True, Bob ?
Comment 2 Pete Zaitcev 2004-02-14 00:30:34 UTC 
Ingolf, please attach the patch.
Comment 3 Ingolf Salm 2004-02-16 17:30:21 UTC 
Pete, I will look for the patch.
Comment 4 Georg Markgraf 2004-02-17 10:26:55 UTC 
This is required for DevQual with ESCON, FICON
Comment 5 Bob Johnson 2004-02-17 14:46:04 UTC 
Why is IBM removing our internal QA contact ?
Adding Brock back in.
Comment 6 Ingolf Salm 2004-02-17 18:03:56 UTC 
Created attachment 97761 [details]
path for device qualification problem
Comment 7 Ernie Petrides 2004-05-13 03:47:12 UTC 
The fix for this problem has just been committed to the RHEL3 U3
patch pool this evening (in kernel version 2.4.21-15.4.EL).
Comment 9 John Flanagan 2004-09-02 04:31:05 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