Date: Fri, 2 Jul 2004 22:39:40 -0700 From: Kris Kennaway <kris@obsecurity.org> To: "Thomas T. Veldhouse" <veldy@veldy.net> Cc: John Baldwin <jhb@FreeBSD.org> Subject: Re: HEADSUP: Native preemption added to the kernel scheduler Message-ID: <20040703053940.GA60840@xor.obsecurity.org> In-Reply-To: <40E64302.2020700@veldy.net> References: <200407022021.i62KLi4Y041825@repoman.freebsd.org> <200407021721.52787.jhb@FreeBSD.org> <40E64302.2020700@veldy.net>
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[-- Attachment #1 --] On Sat, Jul 03, 2004 at 12:24:18AM -0500, Thomas T. Veldhouse wrote: > John Baldwin wrote: > > >In theory this is a big NOP except for some small optimizations in the > >form of avoiding a few context switches and avoiding some run queue > >operations. Several people have tested this code but there may be some > >remaining adventures. Note that this adds a printf during dmesg for > >architectures that do not support preemption about preemption being > >disabled and degrading performance (mostly via increased latency). > >Preemption is enabled by defining PREEMPTION in <machine/param.h> and > >architecture porters are encouraged to get preemption working on their > >architecture. > > > > > > > > The GENERIC kernel is failing to build now (12AM 7-03-2004) ... > complaining about wrong number of arguments in the following file: > > src/sys/kern/sched_ule.c > > Unfortunately, I did not get the function details before rebooting my > machine into windows. That was fixed a few hours ago. Kris [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (FreeBSD) iD8DBQFA5kacWry0BWjoQKURAhITAJ91RqnZmdQEgRRyogsqRv22ET0UFQCghLex 5abTnnNqvn/o7YPMYMkgqSQ= =PUdY -----END PGP SIGNATURE-----
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