Date: Tue, 20 Dec 2011 19:52:41 -0600 From: Brooks Davis <brooks@FreeBSD.org> To: Gleb Smirnoff <glebius@FreeBSD.org> Cc: freebsd-current <freebsd-current@FreeBSD.org>, Doug Barton <dougb@FreeBSD.org>, Dimitry Andric <dim@FreeBSD.org> Subject: Re: r228700 can't dhclient em0 Message-ID: <20111221015241.GE68792@lor.one-eyed-alien.net> In-Reply-To: <20111220191520.GA70684@FreeBSD.org> References: <4EEF0124.4000902@FreeBSD.org> <4EEF3B22.8010401@FreeBSD.org> <4EF0499D.4070000@FreeBSD.org> <20111220191520.GA70684@FreeBSD.org>
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[-- Attachment #1 --] On Tue, Dec 20, 2011 at 11:15:20PM +0400, Gleb Smirnoff wrote: > Doug, > > On Tue, Dec 20, 2011 at 12:38:53AM -0800, Doug Barton wrote: > D> > I saw this too, when my kernel and userland were out of sync (e.g. just > D> > after installing a new kernel, and before installworld). I suspect it > D> > is caused by the changes in r228571, which cause old ifconfig and > D> > dhclient to not recognize any interfaces. I'm not 100% sure though... > D> > D> I tried replacing both ifconfig and dhclient with the versions that were > D> built along with the new kernel, and that didn't work. > > This shouldn't happen. If you did 'make buildworld buildkernel', then > your world in objdir would have binaries compiled with includes from > source tree, not from /usr/include, thus compatible with new kernel. > > 'make buildworld buildkernel' always produces compatible kernel and > worlds. > > However, if you did 'cd /usr/src/sbin/ifconfig && make all install' then > that didn't work, since used headers from /usr/include. > > D> The traditional (and documented) upgrade process for many years has been > D> to boot the new kernel, make sure it's Ok, then update world. Obviously > D> something different is needed this time, so it needs an UPDATING entry > D> (assuming that all this is not just a bug). > > The documented one says 'Reboot into single user mode' and then install > new world. This path was not broken, since single user mode doesn't > imply network support. While this is the documented path, it's not actually been required except in edge cases for ages (the last I can remember is a.out->elf). It's been long enough that I don't think we can really make people do it except for a short period of time in HEAD. I believe it's unacceptable for a release to release upgrade. > The undocumented brave way 'make installkernel installworld && reboot' > works also, without any problems. At least until someone screws up something else and you now can't use kernel.old either. This is somewhat ok for HEAD users, but I think we should try harder to avoid this sort of situation. -- Brooks [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (FreeBSD) iD8DBQFO8TvoXY6L6fI4GtQRAiJBAJ0VBuNCY6QOQIiDwKwqgHpI8gxTewCfZkHW 9PWeXG2xUFPzDC+xOvaZaTc= =8sY3 -----END PGP SIGNATURE-----
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