9 lines
2.2 KiB
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9 lines
2.2 KiB
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<?xml version="1.0" encoding="ISO-8859-1" standalone="no"?>
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<html xmlns="http://www.w3.org/1999/xhtml"><head><title>spl</title><link rel="stylesheet" href="../../jargon.css" type="text/css"/><meta name="generator" content="DocBook XSL Stylesheets V1.61.0"/><link rel="home" href="../index.html" title="The Jargon File"/><link rel="up" href="../S.html" title="S"/><link rel="previous" href="Spinning-Pizza-of-Death.html" title="Spinning Pizza of Death"/><link rel="next" href="splash-screen.html" title="splash screen"/></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">spl</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="Spinning-Pizza-of-Death.html">Prev</a><EFBFBD></td><th width="60%" align="center">S</th><td width="20%" align="right"><EFBFBD><a accesskey="n" href="splash-screen.html">Next</a></td></tr></table><hr/></div><dt><a id="spl"/><dt xmlns="" id="spl"><b>spl</b>: <span xmlns="http://www.w3.org/1999/xhtml" class="pronunciation">/S<>P<EFBFBD>L/</span></dt></dt><dd><p> [abbrev, from Set Priority Level] The way traditional Unix kernels
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implement mutual exclusion by running code at high interrupt levels. Used
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in jargon to describe the act of tuning in or tuning out ordinary
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communication. Classically, spl levels run from 1 to 7; “<span class="quote">Fred's at
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spl 6 today</span>” would mean that he is very hard to interrupt.
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“<span class="quote">Wait till I finish this; I'll spl down then.</span>” See also
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<a href="../I/interrupts-locked-out.html"><i class="glossterm">interrupts locked out</i></a>.</p></dd><div class="navfooter"><hr/><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="Spinning-Pizza-of-Death.html">Prev</a><EFBFBD></td><td width="20%" align="center"><a accesskey="u" href="../S.html">Up</a></td><td width="40%" align="right"><EFBFBD><a accesskey="n" href="splash-screen.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Spinning Pizza of Death<74></td><td width="20%" align="center"><a accesskey="h" href="../index.html">Home</a></td><td width="40%" align="right" valign="top"><EFBFBD>splash screen</td></tr></table></div></body></html>
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