Bug 1507054 - RT + Omnipath panic [rhel-7.4.z]
Summary: RT + Omnipath panic [rhel-7.4.z]
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: Zhang Yi
Marie Dolezelova
Keywords: ZStream
Depends On: 1503749
TreeView+ depends on / blocked
Reported: 2017-10-27 14:19 UTC by Oneata Mircea Teodor
Modified: 2017-11-30 16:03 UTC (History)
11 users (show)

Previously, the hfi1 driver called the preempt_disable() function to prevent migration on standard Red Hat Enterprise Linux and on Red Hat Enterprise Linux for Real Time. On Red Hat Enterprise Linux for Real Time with the realtime kernel (kernel-rt), calling preempt_disable() triggered a kernel panic. With this update, the kernel-rt code has been modified to use a realtime-specific function call to the preempt_disable_nort() function, which expands to the correct calls based on the kernel that is running. As a result, the hfi1 driver now works correctly on both Red Hat Enterprise Linux kernel and Red Hat Enterprise Linux for Real Time kernel-rt.
Clone Of: 1503749
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 2017-10-27 14:19:04 UTC
This bug has been copied from bug #1503749 and has been proposed to be backported to 7.4 z-stream (EUS).

Comment 8 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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