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Bug 1511382

Summary: [RHEL-RT] Possible regression with NOHZ_FULL & rt_mutexes in IRQ (BZ1250649) [rhel-7.4.z]
Product: Red Hat Enterprise Linux 7 Reporter: Oneata Mircea Teodor <toneata>
Component: kernel-rtAssignee: Clark Williams <williams>
kernel-rt sub component: Other QA Contact: Jiri Kastner <jkastner>
Status: CLOSED ERRATA Docs Contact: Marie Hornickova <mdolezel>
Severity: urgent    
Priority: urgent CC: bhu, daolivei, dhoward, kernel-eus-qe, lgoncalv, stalexan, williams
Version: 7.5Keywords: ZStream
Target Milestone: rc   
Target Release: ---   
Hardware: x86_64   
OS: Linux   
Whiteboard:
Fixed In Version: kernel-rt-3.10.0-693.11.1.rt56.631.el7 Doc Type: Bug Fix
Doc Text:
In the realtime kernel, if the rt_mutex locking mechanism was taken in the interrupt context, the normal priority inheritance protocol incorrectly identified a deadlock, and a kernel panic occurred. This update reverts the patch that added rt_mutex in the interrupt context, and the kernel no longer panics due to this behavior.
 Story Points: ---
Clone Of: 1509264 Environment:
Last Closed: 2017-11-30 16:03:50 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: 1509264    
Bug Blocks:    

Description Oneata Mircea Teodor 2017-11-09 09:32:36 UTC 
This bug has been copied from bug #1509264 and has been proposed to be backported to 7.4 z-stream (EUS).
Comment 10 errata-xmlrpc 2017-11-30 16:03:50 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://access.redhat.com/errata/RHSA-2017:3322