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[installer]: add processor.max_cstate=0 kernel cmdline to intel (#16340)

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This is a fix for PR [kernel] Change grub cmdline to set c-states to 0 for "Intel" CPUs by shlomibitton · Pull Request #6051 · sonic-net/sonic-buildimage (github.com)

The original PR will disable intel idle driver but it cannot limit the max c-state to 1 due to system will fall back to acpi idle driver.

Currently intel_idle.max_cstate=0 is already present, which will disable intel idle driver. With the added option, common idle driver will be disabled as well, so there will not be idle management. This is to prevent a bug that can be triggered by idle instruction on intel platform.

Work item tracking
Microsoft ADO (number only): 24867921
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Xichen96 2023-09-23 15:21:24 +08:00 committed by GitHub
parent 7aeb2fb69e
commit 0e48244cc2
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installer/x86_64/install.sh
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@ -555,7 +555,7 @@ CPUVENDOR="$(cat /proc/cpuinfo | grep -m 1 vendor_id | awk '{print $3}')"
echo "Switch CPU vendor is: $CPUVENDOR"
if echo "$CPUVENDOR" | grep -i 'Intel' >/dev/null 2>&1; then
echo "Switch CPU cstates are: disabled"
CSTATES="intel_idle.max_cstate=0"
CSTATES="processor.max_cstate=1 intel_idle.max_cstate=0"
else
CSTATES=""
fi