Oops, I'm still learning my way around the shutdown process and, indeed, I missed umountroot.
I went ahead and added another lsof right after the call to telinit u, right before MOUNT_FORCE_OPT=, and one *after* the remount of /. It doesn't seem to make any difference: cl...@natty-alpha1:~$ grep DEL /lastlsof-umountroot-post init 1 root DEL REG 251,0 399637 /lib/libnss_files-2.12.2.so init 1 root DEL REG 251,0 399636 /lib/libnss_nis-2.12.2.so init 1 root DEL REG 251,0 399630 /lib/libnsl-2.12.2.so init 1 root DEL REG 251,0 399643 /lib/libnss_compat-2.12.2.so.dpkg-new init 1 root DEL REG 251,0 399644 /lib/libc-2.12.2.so init 1 root DEL REG 251,0 390256 /lib/librt-2.12.2.so init 1 root DEL REG 251,0 399646 /lib/libpthread-2.12.2.so init 1 root DEL REG 251,0 399647 /lib/ld-2.12.2.so cl...@natty-alpha1:~$ grep DEL /lastlsof-umountroot init 1 root DEL REG 251,0 399637 /lib/libnss_files-2.12.2.so init 1 root DEL REG 251,0 399636 /lib/libnss_nis-2.12.2.so init 1 root DEL REG 251,0 399630 /lib/libnsl-2.12.2.so init 1 root DEL REG 251,0 399643 /lib/libnss_compat-2.12.2.so.dpkg-new init 1 root DEL REG 251,0 399644 /lib/libc-2.12.2.so init 1 root DEL REG 251,0 390256 /lib/librt-2.12.2.so init 1 root DEL REG 251,0 399646 /lib/libpthread-2.12.2.so init 1 root DEL REG 251,0 399647 /lib/ld-2.12.2.so I even tried forcing the telinit u by doing 'touch /var/run/init.upgraded', and verified that it ran by adding -x and a sleep at the end of umountroot. This makes sense, because telinit u just sends SIGTERM to upstart, which has no handler, as it was removed by revision 977, and doesn't seem to have been added back. Since SIG_DFL signals are not delivered to init, I'm not sure how umountroot's call to 'telinit u' can help in this case. Unless I'm missing something in upstart's code (quite likely) I think there may still potentially need to be a change in upstart to support re-executing. Another option if this can't be pushed into upstart is to mount a special readonly filesystem at boot just for init's libraries. However, it seems that re-execcing would be simpler than trying to get that right. -- You received this bug notification because you are a member of Ubuntu Server Team, which is a direct subscriber. https://bugs.launchpad.net/bugs/672177 Title: libc6 upgrade causes umount to fail on shutdown because init cannot be restarted -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
