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114 lines
6.6 KiB
Markdown
Linux 内核事件回顾－2014年1月及2月
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================================================================================
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过去两个月来，我一直在本文中更新报道Linux项目的进展情况。请原谅我最近在埋头于一些开发工作。闲话少说，让我们赶紧把落下的功课补上。
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###主线发布（Linus的分支）的相关新闻###
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2014年1月19日，Linux3.13发布。详见[Linux3.13是什么][1]。2014年3月2日，3.14-rc5发布。根据rc版本发布的进程来看，2014年3月底前Linux3.14应该就能正式发布。git中3.14-rc1已经PR（pull requests）的一些摘要更新如下：
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### 来自Len Brown的turbostat更新： ###
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> 一个新的命令行选项 -s，用来dump计数器
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>
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> 加强对Haswell Xeon [HSX]的支持。HSX在支持RAPL上与HSW客户端稍有不同，HSX的上一个版本并不支持turbostat。
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### 来自Olof Johansson的针对ARM SoC的修复： ###
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> 在defconfig中针对相应的平台设备增加了新的驱动
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>
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> 增加多平台覆盖率，修改一些DTS，统一相关设备及其衍生产品的驱动支持
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### 来自Catalin Marinasd的ARM64位补丁：###
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> 支持用PTE_WRITE位来区分某个页面是干净可写的，还是真正的只读页面。
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### 来自Rafael Wysocki的ACPI及电源管理更新：###
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> 修改ACPI核心，即不论当前设备的状态如何，在扫描命名空间的同时，为ACPI表中列出的每一个设备创建一个acpi_device结构对象。这一改动可以在ACPI表失效前，有效防止ACPI热插拔操作时错误地删除某些对象。
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>
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> Todd E Brandt提供了一个用于挂起/恢复性能优化的新工具
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>
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> 修改初始化代码，将ACPI的初始化提前，这样内核就能在计时器初始化的时候继续使用ACPI，同时有可能简化EFI的初始化。 —— 来自李春义（音Chun-Yi Lee）
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>
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> apm-仿真：添加APM休眠事件使其支持suspend2disk —— 用于改进使用休眠技术实现快速启动的嵌入式系统。通过此改动，APM事件通知软件组件，准备休眠以及状态恢复。捕捉apm状态可以有效帮助实现快速启动，同时保持系统状态，用于休眠和恢复。这一改动使apm支持“挂起到磁盘”。
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### 来自张瑞（音Zhang Rui）的热量管理更新：###
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> 实时显示设备树的基础设施硬件的热性能。该工作包含了设备树介绍，描述硬件热行为及其限制，读取分析热数据，并建立热区间及其热参数。另外针对三家设备（TI SoC和hwmon的两台设备）的传感器设备使用新的表述方式进行API初始验证。这是完成验证工作的第一步，即使设备转为使用相应的API并进行验证。
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### Links to 3.14-rcs ###
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- [Linux 3.14-rc1 is out][2]
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- [Linux 3.14-rc2][3]
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- [Linux 3.14-rc3][4]
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- [Linux 3.14-rc4][5]
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- [Linux 3.14-rc5][6]
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### 稳定分支发布的相关新闻 ###
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Jiri Slaby正在接管3.12稳定分支的长期维护工作。Greg KH将继续负责kernel.org的发布。Jiri Slaby负责补丁汇总，发布候选声明。详见[3.12-稳定版内核分支由Jiri Slaby接管][7]。最新的稳定分支发布如下：
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### 最新稳定版及扩展版发布 ###
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#### Release Version Projected EOL ####
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Stable 3.13 3.13.6 Not announced
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Stable 3.12 3.12.14 Not announced
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Stable 3.11 3.11.10 EOL November 29 2013
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Longterm 3.10 3.10.33 September 2015
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Longterm 3.4 3.4.82 October 2014
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Longterm 3.2 3.2.55 2016
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Longterm 3.0 3.0.101 EOL October 22 2013
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Longterm 2.6.34 2.6.34.15 EOL February 10 2014
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Longterm 2.6.32 2.6.32.61 mid-2014
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Extended stable 3.11.y.z 3.11.10.6 [Extended Stable][8]
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Extended stable 3.8.y.z 3.8.13.19 [Extended Stable][9]
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Extended stable 3.5.y.z 3.5.7.31 [Extended Stable][10]
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如果你还想知道这些稳定版的发布是如何管理的，或者新版多久发布一次，详见[Active kernel releases][11]。
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### Linux RT ###
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Linux RT的稳定版发布多的不胜枚举。请移步linux-stable-rt.git查看最新版本。
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### 哪里能找到Linux发布的所有git树？ ###
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#### Linux Release Git ####
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Mainline git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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Stable releases (all) git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git
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Linux RT releases git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-stable-rt.git
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Extended stable releases git://kernel.ubuntu.com/ubuntu/linux.git
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Bleeding edge linux-next git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
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### 思考写在最后 ###
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3.13中的“TCP快速启动”从某些类型的TCP会话中去除了一轮时间轮询，从而大大提升了TCP连接的建立速度，web网页的加载速度也得以改进。
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针对ARM的相关修改是3.14-rc1中的重要更新。许多新设备现在都支持或增加了多平台设备的覆盖率，对DTS的一些修改统一了相关设备及其衍生产品的驱动支持。相对于以前的设备树需要平台间的迁移，多平台配置配合DTS改进现在仅需一个通用设备驱动。这对于ARM的拓展是件好事，它开始能够支持PCI设备了。
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改进嵌入式设备的休眠功能，进而用于快速启动，这对手机和嵌入式设备是个利好。谁愿意自己的手机休眠的时候总出意外？
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Linux3.14-rc5的声明中，Linus Torvalds说道“下一周，下一个rc。一切都很平静，一切都很正常。”基于此，如果没有特殊情况，Linux3.14将在两到三周内发布。与往常一样，紧接着下一个合并窗口也就是3.15-rc1即将打开。
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如果有人想知道Jiri Slaby接管3.12的长期维护后有哪些改变，请放心，一切如常。Jiri Slaby将搜集补丁，发布候补。我志愿测试3.12的候补发布，Guenter Roeck志愿在3.12的补丁队列上运行他的build测试。Greg KH将负责kernel.org的最终发布。
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--------------------------------------------------------------------------------
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via: http://www.linuxjournal.com/content/linux-kernel-news-january-and-february-2014
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译者：[Mr小眼儿](http://blog.csdn.net/tinyeyeser) 校对：[wxy](https://github.com/wxy)
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本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创翻译，[Linux中国](http://linux.cn/) 荣誉推出
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[1]:http://kernelnewbies.org/LinuxChanges
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[2]:https://lkml.org/lkml/2014/2/2/176
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[3]:https://lkml.org/lkml/2014/2/9/372
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[4]:https://lkml.org/lkml/2014/2/16/120
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[5]:https://lkml.org/lkml/2014/2/23/234
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[6]:https://lkml.org/lkml/2014/3/2/257
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[7]:https://lkml.org/lkml/2014/2/26/596
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[8]:https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable
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[9]:https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable
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[10]:https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable
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[11]:https://www.kernel.org/category/releases.html
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