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Linux Weather Forecast - xSicKxBot - 07-02-2018
Linux Weather Forecast
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<h3>Welcome to the Linux Weather Forecast</h3>
<p>This page is an attempt to track ongoing developments in the Linux development community that have a good chance of appearing in a mainline kernel and/or major distributions sometime in the near future. Your “chief meteorologist” is Jonathan Corbet, Executive Editor at <a href="http://www.lwn.net/">LWN.net</a>. If you have suggestions on improving the forecast (and particularly if you have a project or patchset that you think should be tracked), please add your comments below. </p>
<h3>Forecast Summaries</h3>
<p><strong>Current conditions</strong>: the 4.17 kernel was released on June 3; some of the more important additions in this kernel are::</p>
<ul>
<li>Some significant <a href="https://lwn.net/Articles/741171/">scheduler improvements</a> that, in particular, will help with energy-efficient scheduling on mobile devices.</li>
<li>Support for the unloved blackfin, cris, frv, m32r, metag, mn10300, score, and tile architectures has been removed. This change will result in 4.17 being smaller (in terms of lines of code) than 4.16 — only the third time that has happened in the history of the kernel project.</li>
<li>Support for the receiving TLS-encrypted data has been added to the kernel.</li>
<li>The tracing subsystem has gained support for <a href="https://lwn.net/Articles/635522/">histogram triggers</a>, making it easier to aggregate event data in the kernel without needing to write BPF programs.</li>
</ul>
<p>In addition to that, of course, is a long list of bug fixes, code cleanups, and more. The 4.17 kernel was the work of 1,700 developers who contributed over 13,500 individual changes; see <a href="https://lwn.net/Articles/756031/">this article</a> for more information on where 4.17 came from.</p>
<p><b>Short-term forecast</b>: the 4.18 kernel can be expected in early August. There are a number of changes coming in this release, including:</p>
<ul>
<li>The <a href="https://lwn.net/Articles/744047/">power domains subsystem</a> has seen a number of enhancements that will lead to improved whole-system power management.</li>
<li>It is now possible for unprivileged processes to <a href="https://lwn.net/Articles/755593/">mount filesystems</a> when running in a user namespace. This will make it possible to mount filesystems within containers without the need for additional privileges.</li>
<li><a href="https://lwn.net/Articles/754681/">Zero-copy TCP data reception</a> is now supported.</li>
<li>The <a href="https://lwn.net/Articles/750845/">AF_XDP</a> subsystem will eventually lead to highly accelerated networking in a number of settings. This work is part of a larger effort to win back users of user-space networking stacks by providing better facilities in the kernel.</li>
<li><a href="https://lwn.net/Articles/747551/">Bpfilter</a> is a new packet-filtering mechanism based on the BPF virtual machine. The 4.18 version of bpfilter won’t do much, but it is expected to be the base on which the next generation of kernel firewalling systems is built.</li>
<li><a href="https://lwn.net/Articles/737662/">Restartable sequences</a>, a new API for performing highly optimized lockless operations in user space, have finally made it into the mainline kernel.</li>
</ul>
<p>It’s also worth noting that the <a href="https://lwn.net/Articles/743714/">new AIO-based polling mechanism</a>, originally merged for 4.18, has been <a href="https://lwn.net/Articles/758324/">reverted</a> pending further work. 4.18 is in the stabilization phase now, so there should be no new features merged during this development cycle.</p>
<p>This <a class="external text" href="http://purl.org/dc/elements/1.1/" title="http://purl.org/dc/elements/1.1/">work</a> is licensed under a <a class="external text" href="http://creativecommons.org/licenses/by-sa/3.0/" title="http://creativecommons.org/licenses/by-sa/3.0/">Creative Commons Attribution-ShareAlike 3.0 License</a>.</p>
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