On Mon, Nov 9, 2015 at 2:36 PM, Jarry <mr.ja...@gmail.com> wrote: > On 08-Nov-15 17:58, Mike Gilbert wrote: >> >> On Fri, Nov 6, 2015 at 12:19 PM, Jarry <mr.ja...@gmail.com> wrote: >>> >>> Hi Gentoo-users, >>> >>> I noted one strange thing today: It seems one of my servers lost "/"! >>> >>> vs5-dns ~ # df >>> Filesystem 1K-blocks Used Available Use% Mounted on >>> /var/log/named 10138552 2223148 7377344 24% /chroot/dns/var/log/named >>> tmpfs 308196 420 307776 1% /run >>> dev 10240 0 10240 0% /dev >>> shm 1540968 0 1540968 0% /dev/shm >>> cgroup_root 10240 0 10240 0% /sys/fs/cgroup >>> none 1048576 0 1048576 0% /var/tmp/portage >> >> >> Is your /etc/mtab a regular file, or is it a symlink to >> /proc/self/mounts? The latter is recommended. > > > It is regular file. I never changed it... > > vs5-dns ~ # ls -l /etc/mtab > -rw-r--r-- 1 root root 908 Nov 9 19:14 /etc/mtab > >> Anyway, please have a look at the contents of /etc/mtab, >> /proc/self/mounts, and proc/self/mountinfo while named is running and >> when it is stopped. If you pastebin them we can take a look for key >> differences. > > > With bind running: > http://pastebin.com/wkTW6xAY > > without bind: > http://pastebin.com/JG5FPNDW > > While I can see some differences there, I still do not understand > why is "/" missing in "df" output. BTW I can not proove it, but this > was not the case all the time. At least when I was tuning monitoring > software, I'm pretty sure "/" was there...
It may be a bug. Can you try replacing /etc/mtab with a symlink to /proc/self/mounts to see if it makes any difference? That triggers different code paths in several programs.
