Embarking on upgrade from 6.1-RELEASE to 7-CURRENT

[Kevin Oberman]

> Date: Sat, 13 Jan 2007 18:55:36 -0800
> From: Garrett Cooper <youshi10 at u.washington.edu>
> Sender: owner-freebsd-current at 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.

> 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.

> 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.

> 4. How is SATA support for SIS motherboards under 7? Decent?

No idea. I have neither a SIS mobo or a SATA system.

> 5. Is 7 running gcc-4.x?

Not yet, but it should be coming fairly soon.
-- 
R. Kevin Oberman, Network Engineer
Energy Sciences Network (ESnet)
Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab)
E-mail: oberman at es.net			Phone: +1 510 486-8634
Key fingerprint:059B 2DDF 031C 9BA3 14A4  EADA 927D EBB3 987B 3751
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