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Bug 1400930

Summary:	RT kernel panics with dm-multipath enabled
Product:	Red Hat Enterprise Linux 7	Reporter:	Marcel Kolaja <mkolaja>
Component:	kernel-rt	Assignee:	Clark Williams <williams>
kernel-rt sub component:	Multipath	QA Contact:	Lin Li <lilin>
Status:	CLOSED ERRATA	Docs Contact:
Severity:	unspecified
Priority:	high	CC:	agk, bhu, bmarzins, jkastner, lgoncalv, lilin, mpoledni, msnitzer, nsoffer, vdronov, williams, xni, yizhan
Version:	7.4	Keywords:	ZStream
Target Milestone:	rc
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:	Previously, the device mapper (DM) subsystem was not notified that the real-time kernel changes the way preemption works with spinlocks. This caused a kernel panic when the dm-multipath kernel module was loaded because the interrupt request (IRQ) check was invalid on the real-time kernel. This check has been corrected enabling the system to boot correctly with the dm-multipath module enabled.	Story Points:	---
Clone Of:	1389215	Environment:
Last Closed:	2017-01-17 18:25:55 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:	1389215
Bug Blocks:

Description Marcel Kolaja 2016-12-02 10:44:31 UTC

This bug has been copied from bug #1389215 and has been proposed
to be backported to 7.3 z-stream (EUS).

Comment 3 Clark Williams 2016-12-13 20:08:43 UTC

commit b984063401e0eddbc2c6fc0daf6a5257f7e4cba4 added to RT 7.3.z tree (cherry-picked from upstream commit: fef016306919048a4db85c43aad09593efb3af4b) and is in kernel-rt-3.10.0-514.5.1.rt56.el7 and higher.

Comment 8 errata-xmlrpc 2017-01-17 18:25:55 UTC

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHSA-2017-0091.html