sudo pacman -S linux-lts linux-lts-headers
sudo pacman -Rsn linux linux-headers
sudo grub-mkconfig -o /boot/grub/grub.cfg
reboot

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开启BBR
sudo sysctl net.ipv4.tcp_congestion_control=bbr

永久开启BBR
# Load the BBR kernel module.
echo “tcp_bbr” > /etc/modules-load.d/modules.conf

# Set the default congestion algorithm to BBR.
echo “net.core.default_qdisc=fq” > /etc/sysctl.d/bbr.conf
echo “net.ipv4.tcp_congestion_control=bbr” >> /etc/sysctl.d/bbr.conf