Date: Sat, 8 Apr 2006 10:23:26 +0200 (CEST) From: patrick <patrick@cyberwizards.nl> To: freebsd-amd64@freebsd.org Subject: Re: safe way to build i386 arch makeworld on amd64 arch? Message-ID: <20060408102045.F94334@gandalf.cyberwizards.nl> In-Reply-To: <E1FS8bD-000OjG-2i@cs1.cs.huji.ac.il> References: <E1FS8bD-000OjG-2i@cs1.cs.huji.ac.il>
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Thanks all for feedback. i did some tresstesting on apache and it seems like 'perfoming well' I guess the best option for me is just add some more memory ;) Enjoy! grtz patrick >>>> is there a save way to 'downgrade' an amd64 build system by using 'make world' ? >>>> >>>> e.g. just remove the CPUTYPE=opteron from the make.conf file and do a >>>> build world/kernels install world/kernels ? >> >> To downgrade? Not realistically. >> >> That would certainly allow him to crosscompile an i386 kernel, and >> world, but wouldn't have much effect on downgrading from AMD64 to >> i386, since you run into a chicken or the egg problem with the kernel, >> and world. (a 64-bit kernel does not play nice on a 32-bit world, >> without some hacking around, and a 32-bit kernel does not play nice on >> a 64-bit world), which makes it impossible to actually do both steps. >> >> If you install the 32-bit kernel first, and reboot, the kernel won't >> be able to run the 64-bit binaries. If you install the 32-bit world >> first, the 64-bit kernel will become very, very sad, and won't let the >> installation complete. >> >> If you try to install the kernel, then the world without a reboot, you >> have the same problem as installing the 32-bit world first, since even >> with a 32-bit kernel installed, you're still RUNNING the 64-bit kernel >> until you reboot. >> >> There are actually ways to do this, but its almost always a bad idea. >> Not to mention this will break any packages, or ports you're using >> too, with the exception, perhaps, of Linux Compat. > You are of course correct, but then again, I did mention DESTDIR= > and MAKEOBJDIRPREFIX. > > personaly, machines that are not diskless, i tend to have 2 root slices > (it only needs some 500 Mgb), and install on a non active slice/partition, then > i do 'boot0cfg -sn device'. When that fails i do have to go to the console > and reboot from the old partition :-(, this is nice if the console is > walking distance away ...
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