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Created attachment 480214[details]
linux-2.6.32-s390-qeth-no-ipa-in-offline.patch
linux-2.6.32-s390-qeth-no-ipa-in-offline.patch
Description: qeth: remove needless IPA-commands in offline
Symptom: slow or even hanging shutdown of qeth devices
Problem: If a qeth device is set offline, data and control
subchannels are cleared, which means removal of all
IP Assist Primitive settings implicitly. There is
no need to delete those settings explicitly.
Moreover shutdown of qeth devices may even hang
if hardware currently has a problem to handle those
IPA-commands.
Solution: This patch removes all IP Assist invocations from
offline.
Server architecture(s): System z
Server type: s390x
General component: kernel
Other components involved: No
Does the server have the latest GA firmware?
Yes.
Has the problem been shown to occur on more than one system?
Yes.
Is a tested patch available?
Yes.
If yes to the above, has it been approved upstream?
The patch has been sent upstream for inclusion into an -rc version.
What is the latest official Red Hat build on which this bug has been seen?
RHEL6.1 Alpha
The patch has been tested and fixes the problem.
With best regards,
Hendrik
Comment 1Hendrik Brueckner
2011-03-07 10:14:46 UTC
The patch has been posted to rhkernel by Hendrik Brueckner <brueckner>
Comment 2RHEL Program Management
2011-03-07 15:20:57 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.
=== In Red Hat Customer Portal Case 00426281 ===
--- Comment by IBM bug, proxy on 3/10/2011 9:16 AM ---
------- Comment From mgrf.com 2011-03-10 09:10 EDT-------
Hello Joe, John,
Please handle this via exception process for RHEL 6.1
Business justification:
====================
Symptom:
Significantly increased waiting times of several minutes up to
hangs with network device recoveries when certain HW issues
occur in parallel that should not have any impact to customers
Impact:
Customers observe unacceptable waiting times or even hangs
with network device recoveries that should be handled by the
system without customer impact.
This did not generate customer impact in the past but can be
significantly now with more complex (re-)configuration scenarios.
Especially because waiting times occur randomly (more or less impact) depending on possible parallel HW issues being handled.
Business Impact:
Customers will not accept waiting times up to 4 minutes and hangs
with network operations and experience the distribution as not usable
for production.
====================
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-2011-0542.html
Created attachment 480214 [details] linux-2.6.32-s390-qeth-no-ipa-in-offline.patch linux-2.6.32-s390-qeth-no-ipa-in-offline.patch Description: qeth: remove needless IPA-commands in offline Symptom: slow or even hanging shutdown of qeth devices Problem: If a qeth device is set offline, data and control subchannels are cleared, which means removal of all IP Assist Primitive settings implicitly. There is no need to delete those settings explicitly. Moreover shutdown of qeth devices may even hang if hardware currently has a problem to handle those IPA-commands. Solution: This patch removes all IP Assist invocations from offline. Server architecture(s): System z Server type: s390x General component: kernel Other components involved: No Does the server have the latest GA firmware? Yes. Has the problem been shown to occur on more than one system? Yes. Is a tested patch available? Yes. If yes to the above, has it been approved upstream? The patch has been sent upstream for inclusion into an -rc version. What is the latest official Red Hat build on which this bug has been seen? RHEL6.1 Alpha The patch has been tested and fixes the problem. With best regards, Hendrik