Bug 1511382 - [RHEL-RT] Possible regression with NOHZ_FULL & rt_mutexes in IRQ (BZ1250649) [rhel-7.4.z]
Summary: [RHEL-RT] Possible regression with NOHZ_FULL & rt_mutexes in IRQ (BZ1250649) ...
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: kernel-rt
Version: 7.5
Hardware: x86_64
OS: Linux
Target Milestone: rc
: ---
Assignee: Clark Williams
QA Contact: Jiri Kastner
Marie Dolezelova
Keywords: ZStream
Depends On: 1509264
TreeView+ depends on / blocked
Reported: 2017-11-09 09:32 UTC by Oneata Mircea Teodor
Modified: 2017-11-30 16:03 UTC (History)
7 users (show)

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.
Clone Of: 1509264
Last Closed: 2017-11-30 16:03:50 UTC

Attachments (Terms of Use)

External Trackers
Tracker ID Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2017:3322 normal SHIPPED_LIVE Moderate: kernel-rt security, bug fix, and enhancement update 2017-11-30 20:18:55 UTC

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.


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