http://www.santa-li.com/tags/kernel/ Recent content in Kernel on santa-li.com Hugo en-us Wed, 30 Dec 2015 00:00:00 +0000 http://www.santa-li.com/post/2015-12-30-linux-on-broadband/ Wed, 30 Dec 2015 00:00:00 +0000 http://www.santa-li.com/post/2015-12-30-linux-on-broadband/ <blockquote> <p><strong>Note (2026):</strong> This post was written in 2015 for Linux kernel 2.4.x/2.6.x and is preserved here purely for historical interest. Several things have changed significantly since then — <code>tcp_fack</code> and <code>route.flush</code> have been removed from modern kernels entirely, the recommended window sizes are far too conservative for today&rsquo;s connections (modern kernels auto-tune well beyond 512KB by default), and ECN is now widely supported and should generally be <em>enabled</em>, not disabled. If you&rsquo;re trying to tune a modern Linux system for broadband, please look for a guide targeting the current kernel. Don&rsquo;t copy-paste the <code>sysctl.conf</code> block below onto anything running kernel 4.x or later.</p></blockquote>