cvs commit: src/include string.h
memchr.3 memrchr.c src/sys/sys param.h
rwatson at FreeBSD.org
Fri May 30 15:11:30 UTC 2008
On Fri, 30 May 2008, Alexander Leidinger wrote:
>>>> So, this is neither a vote for nor against a backout, but this is a
>>>> general call to resist the conservative tendancy that says "don't MFC
>>>> minor things" because, in macro, it has a significant drag effect on the
>>>> MFC process that keeps RELENG branches maintainable.
>>> Ok, but consider the prior email with kan about MFC's after an 8.0
>>> release. Since you must be able to run 7.x binaries on 8.0, then you can't
>>> MFC any symbol changes from 8.0+ back to 7.x. The symbols are basically
>>> frozen in 7.x after 8.0 is released.
>> Sounds like a bug. :-)
> We have the possibility of this behavior even in older releases. Imagine a
> 8.0 release and a 8.1 release before a 7.4 release. And let 8.1 have a
> symbol which is not available in 8.0 (MF9). Now let's MFC this symbol to
> 7-stable before 7.4. Boom, you can not run a 7.4 binary which uses this
> symbol on 8.0.
> More or less it comes down to be careful about things to MFC (don't MFC
> symbols to the second last branch).
I think everyone is fine with "you must be careful". What I think some of us
would be less fine with is "you can't do it at all".
Robert N M Watson
University of Cambridge
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