Linux 4.20 的主要新特性包括：BPF 支持网络流解析器；taprio 流量调度器；点对点 DMA 支持；移除可变长数组；XArrays 数据结构，驱动和硬件方面的更新包括支持 AMD Picasso APU 和 Raven 2 APU，NVIDIA Nouveau 开源驱动初步支持 HDMI 2.0；支持成都海光的 x86 服务器芯片 Dhyana(基于 Zen 架构)；支持另一个来自中国的 C-SKY 32 位 CPU 架构；初步支持 AMD Zen 2 CPU，支持高通 Snapdragon 835，华为海思 Hi3670，等等。

Ubuntu下安装方法，进入Linux v4.20 mainline build下载这四个deb包：

https://kernel.ubuntu.com/~kernel-ppa/mainline/v4.20/linux-headers-4.20.0-042000_4.20.0-042000.201812232030_all.deb

https://kernel.ubuntu.com/~kernel-ppa/mainline/v4.20/linux-headers-4.20.0-042000-generic_4.20.0-042000.201812232030_amd64.deb

https://kernel.ubuntu.com/~kernel-ppa/mainline/v4.20/linux-image-unsigned-4.20.0-042000-generic_4.20.0-042000.201812232030_amd64.deb

https://kernel.ubuntu.com/~kernel-ppa/mainline/v4.20/linux-modules-4.20.0-042000-generic_4.20.0-042000.201812232030_amd64.deb

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