Linux Kernel 5.4 发布支持 exFAT 文件系统和内核锁定功能。
原文地址：Linux Kernel 5.4 Officially Released with exFAT Support, Kernel Lockdown Feature
Linus Torvalds announced today the general availability of the Linux 5.4 kernel series, a major release that adds numerous new features, stronger security, and updated drivers for better hardware support.
Linux kernel 5.4 has been in development since early October and received a total of eight Release Candidate milestones, which implemented numerous new features starting with the initial support for Microsoft’s exFAT file system that’s now finally built-in in the kernel to offer users an out-of-the-box experience when connecting exFAT formatted drives.
Another major change introduced in Linux kernel 5.4 is the kernel lockdown feature, which is implemented as a Linux Security Module to restrict certain applications from accessing the kernel. It adds a new layer of protection, built in the kernel, to make it possible to run software as it was intended by its creator, thus blocking malicious actors.
There’s also good news news for AMD gamers, as Linux kernel 5.4 adds support for AMD Radeon Navi 12 and 14 GPUs, AMD Radeon Arcturus GPUs, as well as AMD Dali APU support. Moreover, AMD Ryzen 3000 series CPUs recieved temperature reporting support and the AMD EPYC microprocessors now have improved load balancing.
Other noteworthy features include support for Intel Tiger Lake CPUs, support for Qualcomm Snapdragon 855 SoCs, Intel Lightning Mountain SoC support, improved app memory management on Android, a new high-performance virtio driver for sharing files between hosts and guests called virtio-fs, a new security feature for detecting file tampering called fs-verity, and dm-clone for live cloning of block devices.
“This obviously opens the merge window for 5.5. It’s not ideal timing with Thanksgiving week coming up, but it hopefully shouldn’t be too much of an issue. If I fall behind (not because I’m all that big of a fan of the indiscriminate and relentless turkey-killing holiday) it’s because we’ve got all three kids back for the holiday, and I might push some ot the merging to the second week as a result. We’ll see what happens,” said Linus Torvalds.
Not yet ready for mass deployments
The Linux kernel 5.4 sources are available to download right now from kernel.org or through our free Linux software portal if you want to compile it yourself, something that’s only recommended to advanced users. The rest of the world should wait for the Linux 5.4 kernel packages to land in the stable software repositories of their favorite GNU/Linux distributions.
Also, please keep in mind that this is currently tagged as a “mainline” kernel branch, meaning that it’s still considered a pre-release version not yet ready for mass deployments. Linux kernel 5.4 will become “stable” and ready for mass adoption when the first point release hits the streets, which usually happens within a week or two from the official release.
Linus Torvalds 宣布了 Linux 5.4 内核系列的全面可用性。该版本是一个主要版本，其添加了许多新功能，更强的安全性和更新的驱动程序，以提供更好的硬件支持。
据悉，Linux 内核 5.4 自 10 月初以来一直处在开发中，并一共获得了八个候选发布里程碑版本。这一系列努力让很多新功能得以被实现，首先是对 Microsoft 的 exFAT 文件系统的最初支持，现如今终于在内核中内置了该功能，以便为用户提供连接 exFAT 格式化驱动器时的即装即用体验。
同时，Linux 内核 5.4 中引入的另一个主要更改是内核锁定功能，该功能被实现为 Linux 安全模块，以限制某些应用程序访问内核。它增加了内置在内核中的新保护层，以使其能够按其创建者的意图运行软件，从而阻止了恶意行为者。
另一方面，针对 Linux 游戏玩家的福音，Linux 内核 5.4 则增加了对 AMD Radeon Navi 12 和 14 GPU，AMD Radeon Arcturus GPU 以及 AMD Dali APU 支持的支持。此外，AMD Ryzen 3000 系列 CPU 获得了温度报告支持，而 AMD EPYC 微处理器改善了负载平衡。
其他一些功能还包括有，对 Intel Tiger Lake CPU 的支持；对 Qualcomm Snapdragon 855 SoC 的支持；对 Intel Lightning Mountain SoC 的支持；在 Android 上改进的应用程序内存管理；一种新的高性能 virtio 驱动程序，用于在主机和来宾之间共享文件，称为 virtio-fs；一种新的安全功能，用于检测文件篡改，称为 fs-verity，以及 dm-clone 用于实时克隆块设备。
值得一提的是，该版本目前被标记为“主线”内核分支，此举也意味着它仍被视为尚未准备好进行大规模部署的预发行版本。当第一个发行点发布时，Linux 内核 5.4 将变得“稳定”并为大规模采用做好准备，而这通常会在正式发行后的一两个星期内发生。
- Linux Kernel 5.4
- The Linux Kernel Archives