Date: Mon, 12 Jul 2004 15:39:01 -0400 (EDT) From: Robert Watson <rwatson@freebsd.org> To: Arjan van Leeuwen <avleeuwen@piwebs.com> Cc: Ariff Abdullah <skywizard@mybsd.org.my> Subject: Re: Native preemption is the culprit [was Re: today's CURRENT lockups] Message-ID: <Pine.NEB.3.96L.1040712153808.34546D-100000@fledge.watson.org> In-Reply-To: <opsa1homcv3qdyu1@localhost>
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On Mon, 12 Jul 2004, Arjan van Leeuwen wrote: > > I tried to upgrade my kernel from 5.2.1 to -CURRENT and cvsupped > > post-preemption. Running a UP-Kernel on a UP-Machine with either > > SCHED_ULE or SCHED_BSD froze the machine under heavy load. It doesn't > > survive a buildworld or a medium port-build. > > Same here. Per my earlier post, I've experienced similar unreliability. The work around I'm using is to build with "#define PREEMPTION" from param.h disabled. This results in a quite usable kernel, although quite probably more poor interrupt handling latency, etc. Robert N M Watson FreeBSD Core Team, TrustedBSD Projects robert@fledge.watson.org Principal Research Scientist, McAfee Research
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