Jakub Jelinek wrote : > > When this is printed, this means /sbin/ldconfig surely had to be run > > successfully. > > Actually, I found out what's going on. > If you are unlucky and /sbin/ldconfig run in glibc_post_upgrade (from > glibc's %post) is the last /sbin/ldconfig run during the update, > then at the point when that /sbin/ldconfig is run, files from both > new glibc and old glibc might still exist in the filesystem. > Particularly there might be still /lib/tls/librtkaio-2.3.3.so > (from glibc-2.3.3-20 or earlier) and /lib/tls/librt-2.3.3.so (from > glibc-2.3.3-24 (well, -21 or later, the rpm currently being installed)). > The libraries have the same SONAME (that's because they provide the same > ABI, librt.so.1) but different filename (librtkaio uses kernel aio, > librt is pure userland implementation). > Unfortunately librtkaio is the one picked by ldconfig, so librt.so.1 > stays pointing to librtkaio-2.3.3.so. Some time after glibc %post ends > rpm removes /lib/tls/librtkaio-2.3.3.so (as it is present just in the old > package) and there is a stale symlink. > > If you are lucky and some other package's %post runs ldconfig after the > librtkaio-2.3.3.so file is removed (or if you are upgrading already > from glibc which did not have that file), everything is fine. > > Guess I'll need to add some more ugly hacks into glibc_post_upgrade :(. > > FYI, librtkaio has been removed for FC2, because 2.6.x kernel AIO support > is in a bad shape and insufficient for POSIX AIO on top of it. Thanks a lot for tracking this down and giving such a detailed explanation about the problem! I think such glibc knowledge would be useful to track down something funny that has been seen when trying to run a FC1 chroot on a FC2 test host... can't point to the discussion as sf.net lists seem to have stopped archiving, though :-( Basically all applications in the FC1 root segfault, and this doesn't happen with FC2test or RHLx roots and is reproducible. If it rings a bell, pointers are welcome ;-) Matthias -- Clean custom Red Hat Linux rpm packages : http://freshrpms.net/ Fedora Core release 1.92 (FC2 Test 3) - Linux kernel 2.6.5-1.350 Load : 0.49 0.53 0.45
