Date: Sat, 29 Nov 2003 14:04:27 -0500 (EST) From: Robert Watson <rwatson@freebsd.org> To: Justin Smith <jsmith@drexel.edu> Cc: freebsd-current@freebsd.org Subject: Re: Upgrade experience 5.1p10->5.2 Beta Message-ID: <Pine.NEB.3.96L.1031129140239.42579K-100000@fledge.watson.org> In-Reply-To: <3FC8ECC6.2040108@drexel.edu>
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On Sat, 29 Nov 2003, Justin Smith wrote: > >Are you running with GENERIC from 5.2-BETA? If so, you may wish to > >recompile your kernel with WITNESS and INVARIANTS turned off and see if > >that helps. These debugging features are critical during the development > >process, but also seriously impact performance and might make the > >difference you're seeing. > > This worked like a charm! Everything, including opengl-intensive > applications seem to work perfectly. It's amazing only problem was in > the debugging code! Thank you. When we ship 5.2, it will presumably ship with the debugging features disabled in the GENERIC kernel, but enabled in a second DEBUG kernel in the same way we shipped 5.1. However, it won't become the default in the branch version of the kernel configuration until 5-STABLE. If you run into any stability problems, you'll probably want to turn the debugging features back on again to help diagnose them. You might try turning INVARIANTS back on but leaving WITNESS off and see if that gives you enough performance to do what you need to do while still keeping around some debugging features to help in the event of any problem. Robert N M Watson FreeBSD Core Team, TrustedBSD Projects robert@fledge.watson.org Senior Research Scientist, McAfee Research
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