Date: Sun, 12 Oct 2003 00:55:27 +0000 (UTC) From: naddy@mips.inka.de (Christian Weisgerber) To: freebsd-current@freebsd.org Subject: idprio safe? Message-ID: <bma8pv$ms2$1@kemoauc.mips.inka.de>
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Is it safe nowadays to run a process at idle priority? Or is there still the danger of priority inversion / a deadlock? On FreeBSD 4.x you can run a process, such as setiathome, at nice level 19 and it will (almost) only ever get CPU time when no process of normal priority competes with it. FreeBSD 5.x is much "fairer" in this respect, which has the unpleasant result that such a background process will noticeably compete for CPU now. -- Christian "naddy" Weisgerber naddy@mips.inka.de
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