Bug 1767612
Summary: | RHEL-7 Anaconda mistakenly adding "spectre_v2=retpoline" to Cascade Lake systems. | ||
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Product: | Red Hat Enterprise Linux 7 | Reporter: | Joe Mario <jmario> |
Component: | anaconda | Assignee: | Anaconda Maintenance Team <anaconda-maint-list> |
Status: | CLOSED WONTFIX | QA Contact: | Release Test Team <release-test-team-automation> |
Severity: | high | Docs Contact: | Sharon Moroney <smoroney> |
Priority: | high | ||
Version: | 7.8 | CC: | dshaks, jstodola, longman, natashba, smoroney, ttracy |
Target Milestone: | rc | ||
Target Release: | --- | ||
Hardware: | Unspecified | ||
OS: | Unspecified | ||
Whiteboard: | |||
Fixed In Version: | Doc Type: | Known Issue | |
Doc Text: |
.RHEL 7.7 and later installations add `spectre_v2=retpoline` to Intel Cascade Lake systems
RHEL 7.7 and later installations add the `spectre_v2=retpoline` kernel parameter to Intel Cascade Lake systems, and as a consequence, system performance is affected. To work around this problem and ensure the best performance, complete the following steps.
. Remove the kernel boot parameter on Intel Cascade Lake systems:
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# grubby --remove-args="spectre_v2=retpoline" --update-kernel=DEFAULT
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. Reboot the system:
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# reboot
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Story Points: | --- |
Clone Of: | Environment: | ||
Last Closed: | 2020-03-16 11:16:48 UTC | Type: | Bug |
Regression: | --- | Mount Type: | --- |
Documentation: | --- | CRM: | |
Verified Versions: | Category: | --- | |
oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
Cloudforms Team: | --- | Target Upstream Version: | |
Embargoed: |
Description
Joe Mario
2019-10-31 19:32:10 UTC
Just curious if there's any update on this BZ? It would help us understand what to tell customers. Thank you. Joe Mario Hi Jan: Your suggested text looks good to me. Thank you. Joe This bug won't be fixed and it's recommended to remove the "spectre_v2=retpoline" kernel parameter manually on Intel Cascade Lake systems: # grubby --remove-args="spectre_v2=retpoline" --update-kernel=DEFAULT # reboot |