On Wed, Apr 27, 2011 at 09:27:25AM +0100, Colin Watson wrote: > On Wed, Apr 27, 2011 at 12:52:44AM +0200, Yann Dirson wrote: > > [UPGRADE] grub-pc 1.98+20100804-14 -> 1.99~rc1-13 > > > > When upgrading, aptitude gets stuck with: > > > > Setting up grub-pc (1.99~rc1-13) ... > > Installing new version of config file /etc/grub.d/05_debian_theme ... > > Replacing config file /etc/default/grub with new version > > > > $ pstree -alp 6275 > > grub-pc.postins,6275 /var/lib/dpkg/info/grub-pc.postinst configure > > 1.98+20100804-14 > > ââgrep,6277 -v ^(fd[0-9]\\+) > > ââgrub-mkdevicema,6276 -m - > > > > $ ps l 6275 6277 6276 > > F UID PID PPID PRI NI VSZ RSS WCHAN STAT TTY TIME COMMAND > > 1 0 6275 6180 20 0 10884 752 wait S+ pts/5 0:00 > > /bin/bash /var/lib/dpkg/info/grub-pc.postinst configure 1.98+20100804-14 > > 0 0 6276 6275 20 0 18288 928 blkdev D+ pts/5 0:00 > > grub-mkdevicemap -m - > > 0 0 6277 6275 20 0 7592 572 pipe_w S+ pts/5 0:00 grep > > -v ^(fd[0-9]\+) > > > > $ ps -o pid,wchan=WIDE-WCHAN-COLUMN -o comm 6276 > > PID WIDE-WCHAN-COLUMN COMMAND > > 6276 blkdev_get grub-mkdevicema > > > > > > Nothing suspect from dmesg - any idea how to quickly get more precise > > info ? Not sure I can get out of this to retry except by rebooting, > > which would be quite a shame... > > It may be difficult retrospectively. Can you attach strace to find out > what system call it's stuck in, and attach gdb (you may need to build > grub2 locally for symbols) to get a backtrace?
Unfortunately, neither can complete attaching to the process, and I even have to use kill -9 to get rid of strace and gdb afterwards. Looks like I'd have to reboot and add the strace call to the postinst before retrying ? Bad bad bad :} Maybe we can get some info from the kernel about the syscall details. I have a couple of debugging features activated in this kernel (kgdb notably), I could try to peek via this channel. Other ideas ? -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
