Date: Wed, 14 Jan 2009 12:18:44 -0800 From: Chuck Swiger <cswiger@mac.com> To: Ewald Jenisch <a@jenisch.at> Cc: icemaca <icemaca@gmail.com>, freebsd-questions@freebsd.org Subject: Re: kernel configuration Message-ID: <B4DD918A-6026-4206-9C14-70DCD0028CFB@mac.com> In-Reply-To: <20090114181522.GB4487@aurora.oekb.co.at> References: <496E06D1.2070706@gmail.com> <20090114181522.GB4487@aurora.oekb.co.at>
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On Jan 14, 2009, at 10:15 AM, Ewald Jenisch wrote: > On Wed, Jan 14, 2009 at 04:37:53PM +0100, icemaca wrote: >> >> this i386 version has >> >> cpu I486_CPU >> cpu I586_CPU >> cpu I686_CPU >> > > Basically you can comment all but I686_CPU since the others are for > earlier x86 architectures. While it is true that you can comment out all but i686 and get a working kernel, you will experience reduced performance. There are a number of low-level assembly routines (cf sys/i386/i386/support.s such as i586_bcopy) that are conditionalized off of I586_CPU only, even though they provide an advantage on i686 platforms also. -- -Chuck
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