Date: Fri, 4 Jul 2008 20:27:44 -0400 From: Mike Meyer <mwm-keyword-freebsdhackers2.e313df@mired.org> To: "Alexander Sack" <pisymbol@gmail.com> Cc: Matthias Apitz <matthias.apitz@oclc.org>, freebsd-hackers@freebsd.org, guru@unixarea.de, Mike Meyer <mwm-keyword-freebsdhackers2.e313df@mired.org> Subject: Re: kernel HEAD && userland 7.0-REL? Message-ID: <20080704202744.083436a4@bhuda.mired.org> In-Reply-To: <3c0b01820807041712l39bdafd8sf3914c2b462023c6@mail.gmail.com> References: <20080704124227.GA10264@rebelion.Sisis.de> <20080704164015.514425fd@bhuda.mired.org> <3c0b01820807041712l39bdafd8sf3914c2b462023c6@mail.gmail.com>
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On Fri, 4 Jul 2008 20:12:58 -0400 "Alexander Sack" <pisymbol@gmail.com> wrote: > On Fri, Jul 4, 2008 at 4:40 PM, Mike Meyer > <mwm-keyword-freebsdhackers2.e313df@mired.org> wrote: > > On Fri, 4 Jul 2008 14:42:27 +0200 > > Matthias Apitz <guru@unixarea.de> wrote: > >> I'm running a RELENG_7 kernel and a userland as 7.0-REL on one of my > >> laptops; I've been asked to check if a given driver problem in RELENG_7 is as > >> well with HEAD... can I update the kernel to HEAD and let the userland > >> (and all my compiled ports) as 7.0-REL; I know that this is not the > >> intention, but it would cost me a lot of work if I should compile as > >> well ~200 ports.... > > > > When you say HEAD, do you mean the HEAD of 8-CURRENT or 7-STABLE? In > > either case whether or not it works depends on whether something has > > changed in the kernel that has a required userland change. > > > > On the other hand, if you mean 7-STABLE, then the ports should work > > properly whether userland does or not. > > As a note, I just recently used HEAD on a 7_STABLE box to test changes > recently to re for an updated PCIe revision NIC card on my Eee Box. > It worked fine (both runtime and my NIC which I then patched my > 7_STABLE tree which also worked, yea!). In a thread I started about > cross platform building, it seems that historically FreeBSD has had a > very stable ABI allowing multiple kernels to run underneath different > versions of user land (this is certainly not the case for all *NIX > variants). So stable that the things that break when you try and do this have made it into the FAQ: http://www.freebsd.org/doc/en_US.ISO8859-1/books/faq/troubleshoot.html#NLIST-FAILED Personally, I managed to try this once when the console driver needed a termcap entry change as well :-(. <mike -- Mike Meyer <mwm@mired.org> http://www.mired.org/consulting.html Independent Network/Unix/Perforce consultant, email for more information. O< ascii ribbon campaign - stop html mail - www.asciiribbon.org
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