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OCPBUGS-38900: Drop sched_migration_cost_ns setting #1163
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OCPBUGS-38900: Drop sched_migration_cost_ns setting #1163
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@jmencak: This pull request references Jira Issue OCPBUGS-38900, which is valid. The bug has been moved to the POST state. 3 validation(s) were run on this bug
No GitHub users were found matching the public email listed for the QA contact in Jira (liqcui@redhat.com), skipping review request. The bug has been updated to refer to the pull request using the external bug tracker. In response to this:
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When using a PerformanceProfile, a TuneD scheduler was setting sched_migration_cost_ns. This setting was previously used by throughput-performance and latency-performance profiles. However, it was dropped from these profiles based on performance evaluation for RHEL-9 as discussed in rhbz#1957829. Setting sched_migration_cost_ns causes issues when SecureBoot/kernel_lockdown is in effect. Do not set this tunable when using PerformanceProfiles. Resolves: OCPBUGS-38900
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@jmencak: The following tests failed, say
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When using a PerformanceProfile, a TuneD scheduler was setting sched_migration_cost_ns. This setting was previously used by throughput-performance and latency-performance profiles. However, it was dropped from these profiles based on performance evaluation for RHEL-9 as discussed in rhbz#1957829.
Setting sched_migration_cost_ns causes issues when SecureBoot/kernel_lockdown is in effect. Do not set this tunable when using PerformanceProfiles.
Resolves: OCPBUGS-38900