Why does lscpu reports "Device or Resource busy" when smt is turned off in RHEL8.8?
Issue
- Why does lscpu reports "Device or Resource busy" when smt is turned off in RHEL8.8?
# echo off > /sys/devices/system/cpu/smt/control
# lscpu
lscpu: cannot read /sys/devices/system/cpu/cpu32/cpufreq/cpuinfo_max_freq: Device or resource busy
- Why
lscpu
reportsDevice or Resource busy
when any cpu is disabled?
# chcpu -d 1
CPU 1 disabled
# lscpu
lscpu: cannot read /sys/devices/system/cpu/cpu1/cpufreq/cpuinfo_max_freq: Device or resource busy
Environment
- Red Hat Enterprise Linux 8.8
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