From mboxrd@z Thu Jan 1 00:00:00 1970 From: James Bottomley Subject: Re: NTPL transition Date: Fri, 05 Sep 2008 09:07:06 -0500 Message-ID: <1220623626.3331.5.camel@localhost.localdomain> References: <20080904114551.GA18877@tilt.dandreoli.com> <119aab440809040713m2a448cd4sea02cd2df7d7b42c@mail.gmail.com> <20080904152329.GA24316@colo.lackof.org> <119aab440809040831m2a4a3cffy3a8fbc747ca3b4a2@mail.gmail.com> <20080904160407.GB24316@colo.lackof.org> <1220550764.3276.45.camel@localhost.localdomain> <119aab440809050517v2d26e2f1nd2d3e5aa0efe14bd@mail.gmail.com> Mime-Version: 1.0 Content-Type: text/plain Cc: dann frazier , Debian HPPA Port List , linux-parisc To: Carlos O'Donell Return-path: In-Reply-To: <119aab440809050517v2d26e2f1nd2d3e5aa0efe14bd@mail.gmail.com> List-ID: List-Id: linux-parisc.vger.kernel.org On Fri, 2008-09-05 at 08:17 -0400, Carlos O'Donell wrote: > On Thu, Sep 4, 2008 at 1:52 PM, James Bottomley > wrote: > > Can we go via an intermediate library that would coexist with current > > glibc? Something like libc6-nptl, then we do the transitional update > > with the tools and other libraries moving over to libc6-nptl, then the > > final piece of the upgrade is libc6 going to nptl based libc6.1 and we > > remove the transitional libc6-nptl? This type of flip will have to be > > done via ld.so.conf magic, but it should be doable. > > No, due to library-to-library dependencies you have the same problem. > You would either have to rebuild *all* the libraries or continue > splitting each library into two packages lib and lib-nptl. We are going to have to rebuild all the libraries, that's not an option because of the ABI change. The problem is not to avoid this, but to find a way of doing an online upgrade. The real problem we have to avoid is breaking system tools that are required to perform the upgrade in the intermediate steps. I don't rule out that will require us to pull this trick with some libraries in addition to libc, but I don't think it will be all of them. Just doing libc will probably fix the majority of the issues, though. James