VMware performance decrease after Retbleed update
Issue
- VMware performance decrease after upgrade to RHEL 8.6
- High CPU usage by
ksoftirqd
after upgrade to RHEL 8.7 - Retbleed mitigations cause heavy CPU usage impact
- CPU utilization is high after patching
Environment
- Red Hat Enterprise Linux 8.6 (
kernel-4.18.0-372.32.1.el8_6
and later) - Red Hat Enterprise Linux 7.9 (
kernel-3.10.0-1160.80.1.el7
and later) - Red Hat Enterprise Linux 9.1 (
kernel-5.14.0-162.6.1.el9_1
and later) - VMware VM
- CPU NOT affected by Retbleed vulnerability:
- Broadwell
- Haswell
- Ivy Bridge
- Sandy Bridge
- Westmere EP/EX
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