Date: Wed, 7 Jul 2004 12:05:40 -0400 (EDT) From: Robert Watson <rwatson@FreeBSD.org> To: John Baldwin <jhb@FreeBSD.org> Cc: cvs-all@FreeBSD.org Subject: Re: cvs commit: src/sys/kern sched_ule.c Message-ID: <Pine.NEB.3.96L.1040707120506.37929A-100000@fledge.watson.org> In-Reply-To: <200407071136.31815.jhb@FreeBSD.org>
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On Wed, 7 Jul 2004, John Baldwin wrote: > On Tuesday 06 July 2004 01:57 am, Robert Watson wrote: > > rwatson 2004-07-06 05:57:30 UTC > > > > FreeBSD src repository > > > > Modified files: > > sys/kern sched_ule.c > > Log: > > Temporarily disable preemption in SCHED_ULE due to reported panics and > > hangs due to recent preemption changes. This change appears to remove > > the panic that I was running into, but at the cost of increasing > > ithread scheduling latency, and as such is a temporary band-aid until > > jhb has a chance to resolve the ule<->preemption interaction that is > > the source of the problem. If it doesn't fix the problem for others-- > > sorry! > > It it just broken on SMP? I actually did the commit from a UP > preemption kernel using SCHED_ULE from within X11 with KDE, etc. > running. I was only able to reproduce this with an SMP-enabled kernel; however, the reports on -current were unclear and I didn't follow up on each one. Robert N M Watson FreeBSD Core Team, TrustedBSD Projects robert@fledge.watson.org Principal Research Scientist, McAfee Research
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