Date: Wed, 24 May 2000 11:28:39 -0600 From: Chuck Paterson <cp@bsdi.com> To: Matthew Dillon <dillon@apollo.backplane.com> Cc: "Daniel C. Sobral" <dcs@newsguy.com>, arch@freebsd.org Subject: Re: Preemptive kernel on older X86 hardware Message-ID: <200005241728.LAA07094@berserker.bsdi.com>
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} Nobody is advocating scrapping the 386 for UP kernels. Even when/if } the kernel becomes threaded, it still probably will not be preemptive } but even if it were we are not going to be throwing cmpexg instructions } in mainline *UP* code. If some of the imported code happens to do that, } it's trivial to fix with #ifdef's for 386/486 support. This is actually not true (the nobody part). I'm afraid I have no idea how to do a preemptive kernel where it doesn't diverge so greatly that it won't be effectively a totally separate kernel. I think if FreeBSD is not willing to bite the bullet on going to the preemptive kernel then it just shouldn't get done. Chuck To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-arch" in the body of the message
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