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Adds a script for KVM perf issue mitigation on 6.x kernel #155

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Merged
merged 1 commit into from
Jan 22, 2025
Merged

Adds a script for KVM perf issue mitigation on 6.x kernel #155

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14 changes: 14 additions & 0 deletions src/hyperlight_host/scripts/apply-kvm-perf-mitigation.sh
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Original file line number Diff line number Diff line change
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#!/bin/bash
set -Eeuo pipefail
kernel_version=$(uname -r)
if [[ "$kernel_version" == 6.* ]]; then
if [[ $(cat /sys/devices/system/cpu/vulnerabilities/itlb_multihit) == "Not affected" ]]; then
KVM_VENDOR_MOD=$(lsmod |grep -P "^kvm_(amd|intel)" | awk '{print $1}')
sudo modprobe -r $KVM_VENDOR_MOD kvm
sudo modprobe kvm nx_huge_pages=never
sudo modprobe $KVM_VENDOR_MOD
fi
if [ -f /sys/fs/cgroup/cgroup.controllers ]; then
sudo mount -o remount,favordynmods /sys/fs/cgroup
fi
fi
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