Date: Sat, 13 Jan 2007 20:40:10 -0800 From: Garrett Cooper <youshi10@u.washington.edu> To: freebsd-current@freebsd.org Subject: Re: Embarking on upgrade from 6.1-RELEASE to 7-CURRENT Message-ID: <45A9B42A.3010003@u.washington.edu> In-Reply-To: <20070114035331.082BB45053@ptavv.es.net> References: <20070114035331.082BB45053@ptavv.es.net>
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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Kevin Oberman wrote: >> Date: Sat, 13 Jan 2007 18:55:36 -0800 >> From: Garrett Cooper <youshi10@u.washington.edu> >> Sender: owner-freebsd-current@freebsd.org >> >> Before I do this, I have a few questions; I know that the bulk >> majority of the documentation for my questions may exist online or in >> /usr/src/UPDATING, but I was just curious of the major changes that I >> can expect between 6 and 7: >> >> 1. What scheduler is currently the most complete for SMP/multi-core >> capable processors? > > 4BSD is stable and works well. Jeff R just committed a major overhaul > of ULE and it MAY now perform a bit better and has been reported to be > stable, now. But it is still experimental > d a work in p progress. Ok, sounds good. Will build a ULE and 4BSD scheduler enabled kernel, just in case :). >> 2. Do I need to add some sort of compatibility layer for 6 going to 7 >> (similar to compat_5)? > > There is COMPAT_FREEBSD6, but there is no compat_6x port at this > time. Due to the instability of ABIs in current, be prepared to do a > lot of port building. Ok. At least this machine has less than 30 ports (just Samba, vim-lite, etc). >> 3. What are (briefly) some of the major changes for the ABI/API going >> from 6 to 7? Someone mentioned some changes to the ABI when I emailed >> the hackers@ list previously, so I was just curious. > > Lots of ABI changes. Read /usr/src/UPDATING for the details. ABI changes > should all be mentioned there. Excellent. Good to know it's documented there. >> 5. Is 7 running gcc-4.x? > > Not yet, but it should be coming fairly soon. Ok, cool. I noticed that there were a number of performance enhancements and some tuning stuff going from gcc-3.4 to gcc-4.x, so it'll be nice when that time comes around, but unfortunately building things is going to become complicated for maintainers for a while; I know because I was using Gentoo during the 3.4 -> 4.x move. - -Garrett -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.1 (FreeBSD) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFFqbQpEnKyINQw/HARAvmiAJ0dOHrm8H7i5tAx61WUMT/MQsYy7ACeIH+1 7h5uIZFJIvtdWW5dlKvZZeM= =Abrv -----END PGP SIGNATURE-----
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