Bug 1678956 - Mechanism in Cockpit to enable/disable SMT
Summary: Mechanism in Cockpit to enable/disable SMT
Alias: None
Product: Red Hat Enterprise Linux 8
Classification: Red Hat
Component: cockpit
Version: 8.0
Hardware: Unspecified
OS: Unspecified
Target Milestone: rc
: 8.1
Assignee: Martin Pitt
QA Contact: Release Test Team
Vendula Ferschmannova
Depends On: Red Hat1678933
Blocks: Red Hat1701002 1713186
TreeView+ depends on / blocked
Reported: 2019-02-19 23:40 UTC by Terry Bowling
Modified: 2020-11-14 15:54 UTC (History)
3 users (show)

Fixed In Version:
Doc Type: Enhancement
Doc Text:
.Enabling and disabling SMT Simultaneous Multi-Threading (SMT) configuration is now available in RHEL 8. Disabling SMT in the web console allows you to mitigate a class of CPU security vulnerabilities such as: * link:https://access.redhat.com/security/vulnerabilities/mds[Microarchitectural Data Sampling] * link:https://access.redhat.com/security/vulnerabilities/L1TF[L1 Terminal Fault Attack]
Clone Of:
: 1713186 (view as bug list)
Last Closed: 2019-11-05 22:03:23 UTC
Type: Enhancement
Target Upstream Version:

Attachments (Terms of Use)

System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2019:3518 0 None None None 2019-11-05 22:03:35 UTC

Description Terry Bowling 2019-02-19 23:40:10 UTC
Description of problem:

A user friendly way to easily understand and change the Symmetric MultiThreading hardware feature in RHEL systems is needed.

This may have dependencies on kernel parameter options yet to come, as well as additional guidance on the user interface design.

Comment 3 Martin Pitt 2019-04-02 06:53:49 UTC
This will land in the upstream release 191. Note that the UI currently refers to https://access.redhat.com/security/vulnerabilities/L1TF , the ~ 1 year old Spectre variation. In case there will be a newer/more important variant, it's easy to change the URL to something else, of course.

Comment 5 Martin Pitt 2019-05-20 15:36:12 UTC
I'm preparing a backport to RHEL 8.0, as Terry asked for that for z-stream: https://github.com/cockpit-project/cockpit/pull/11875

This still needs z-stream approval before the bug can be cloned for z-stream.

Comment 12 errata-xmlrpc 2019-11-05 22:03:23 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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