7.1 Release broke my box

[John Hein]

Markus Hitter wrote at 09:52 +0100 on Jan 12, 2009:
 > 
 > Am 12.01.2009 um 03:51 schrieb John Hein:
 > 
 > > Markus Hitter wrote at 01:31 +0100 on Jan 12, 2009:
 > >> Last Friday, after seeing ext2fs doesn't work with the 7.0 kernel, I
 > >> decided to do yet another step and upgrade to 7.1 Release. The
 > >> virtual machine for building tinybsd setup and ran flawlessly, but a
 > >> tinybsd image built from it doesn't like networking any longer. The
 > >> non-working box is a Geode-based Flepo Alpha, which uses the re
 > >> network driver.
 > >
 > > What happens if you build a kernel with the 7.0 version of
 > > sys/dev/re/if_re.c?  You may have to roll back sys/pci/if_rlreg.h too.
 > 
 > The exactly same (had to roll back sys/pci/if_rl.c as well).
 > 
 > > What happens to the link light while these things are happening?
 > 
 > The green light stays on, the yellow one flickers, just like expected.
 > 
 > Obviously, the transmission gets interrupted at some higher level. Do  
 > I really have to bisect the entire kernel with it's 10,000 revisions  
 > now? *sigh*

My guess was the first obvious one I could think of since I knew
changes happened in the re/rl drivers.  I can't think of anything else
obvious between 7.0 & 7.1 that would affect this (particularly since I
have an re that works fine in 7.1 - at least a 7.1 from, say,
September).

As far as bisecting goes, I recommend binary search by date on the
RELENG_7 branch rather than trying to rollback individual revs.  Note
that cvs 1.12 allows checking out by date (-D) on a branch
(-rRELENG_7) (but not 1.11).  Or you can use cvsup to help with that I
think.