Date: Fri, 30 May 2008 16:58:27 +0200 From: Alexander Leidinger <Alexander@Leidinger.net> To: Robert Watson <rwatson@FreeBSD.org> Cc: Maxim Sobolev <sobomax@FreeBSD.org>, src-committers@FreeBSD.org, d@delphij.net, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org, Daniel Eischen <deischen@FreeBSD.org>, Xin LI <delphij@FreeBSD.org>, re@FreeBSD.org, David Schultz <das@FreeBSD.org> Subject: Re: cvs commit: src/include string.h src/lib/libc/string Makefile.inc memchr.3 memrchr.c src/sys/sys param.h Message-ID: <20080530165827.89052ulp729ogzy8@webmail.leidinger.net> In-Reply-To: <20080529162517.V3678@fledge.watson.org> References: <200805272004.m4RK4SZt029194@repoman.freebsd.org> <483C7FF2.6000607@FreeBSD.org> <483C977F.20105@delphij.net> <20080528060333.GA4699@zim.MIT.EDU> <Pine.GSO.4.64.0805281049150.7240@sea.ntplx.net> <20080529084608.X39873@fledge.watson.org> <Pine.GSO.4.64.0805291106120.12774@sea.ntplx.net> <20080529162517.V3678@fledge.watson.org>
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Quoting Robert Watson <rwatson@FreeBSD.org> (from Thu, 29 May 2008 =20 16:29:34 +0100 (BST)): > On Thu, 29 May 2008, Daniel Eischen wrote: > >>> So, this is neither a vote for nor against a backout, but this is =20 >>> a general call to resist the conservative tendancy that says =20 >>> "don't MFC minor things" because, in macro, it has a significant =20 >>> drag effect on the MFC process that keeps RELENG branches =20 >>> maintainable. >> >> Ok, but consider the prior email with kan about MFC's after an 8.0 =20 >> release. Since you must be able to run 7.x binaries on 8.0, then =20 >> you can't MFC any symbol changes from 8.0+ back to 7.x. The =20 >> 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. =20 Imagine a 8.0 release and a 8.1 release before a 7.4 release. And let =20 8.1 have a symbol which is not available in 8.0 (MF9). Now let's MFC =20 this symbol to 7-stable before 7.4. Boom, you can not run a 7.4 binary =20 which uses this symbol on 8.0. More or less it comes down to be careful about things to MFC (don't =20 MFC symbols to the second last branch). Bye, Alexander. --=20 I used to think I was indecisive, but now I'm not so sure. http://www.Leidinger.net Alexander @ Leidinger.net: PGP ID =3D B0063FE7 http://www.FreeBSD.org netchild @ FreeBSD.org : PGP ID =3D 72077137
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