with bind running

vs5-dns ~ # more /etc/mtab
/dev/sda2 / ext4 rw,noatime,data=ordered 0 0
proc /proc proc rw,nosuid,nodev,noexec,relatime 0 0
tmpfs /run tmpfs rw,nodev,relatime,size=308196k,mode=755 0 0
dev /dev devtmpfs rw,nosuid,relatime,size=10240k,nr_inodes=385148,mode=755 0 0
mqueue /dev/mqueue mqueue rw,nosuid,nodev,noexec,relatime 0 0
devpts /dev/pts devpts rw,nosuid,noexec,relatime,gid=5,mode=620 0 0
shm /dev/shm tmpfs rw,nosuid,nodev,noexec,relatime 0 0
sysfs /sys sysfs rw,nosuid,nodev,noexec,relatime 0 0
cgroup_root /sys/fs/cgroup tmpfs rw,nosuid,nodev,noexec,relatime,size=10240k,mode=755 0 0
openrc /sys/fs/cgroup/openrc cgroup rw,nosuid,nodev,noexec,relatime,release_agent=/lib64/rc/sh/cgroup-release-agent.sh,name=openrc 0 0
none /var/tmp/portage tmpfs rw,noatime,size=1024M 0 0
/etc/bind /chroot/dns/etc/bind none rw,bind 0 0
/var/bind /chroot/dns/var/bind none rw,bind 0 0
/var/log/named /chroot/dns/var/log/named none rw,bind 0 0

vs5-dns ~ # more /proc/self/mounts
/dev/sda2 / ext4 rw,noatime,data=ordered 0 0
proc /proc proc rw,nosuid,nodev,noexec,relatime 0 0
tmpfs /run tmpfs rw,nodev,relatime,size=308196k,mode=755 0 0
dev /dev devtmpfs rw,nosuid,relatime,size=10240k,nr_inodes=385148,mode=755 0 0
mqueue /dev/mqueue mqueue rw,nosuid,nodev,noexec,relatime 0 0
devpts /dev/pts devpts rw,nosuid,noexec,relatime,gid=5,mode=620 0 0
shm /dev/shm tmpfs rw,nosuid,nodev,noexec,relatime 0 0
sysfs /sys sysfs rw,nosuid,nodev,noexec,relatime 0 0
cgroup_root /sys/fs/cgroup tmpfs rw,nosuid,nodev,noexec,relatime,size=10240k,mode=755 0 0
openrc /sys/fs/cgroup/openrc cgroup rw,nosuid,nodev,noexec,relatime,release_agent=/lib64/rc/sh/cgroup-release-agent.sh,name=openrc 0 0
none /var/tmp/portage tmpfs rw,noatime,size=1048576k 0 0
/dev/sda2 /chroot/dns/etc/bind ext4 rw,noatime,data=ordered 0 0
/dev/sda2 /chroot/dns/var/bind ext4 rw,noatime,data=ordered 0 0
/dev/sda2 /chroot/dns/var/log/named ext4 rw,noatime,data=ordered 0 0

vs5-dns ~ # more /proc/self/mountinfo
14 0 8:2 / / rw,noatime - ext4 /dev/sda2 rw,data=ordered
15 14 0:4 / /proc rw,nosuid,nodev,noexec,relatime - proc proc rw
16 14 0:14 / /run rw,nodev,relatime - tmpfs tmpfs rw,size=308196k,mode=755
17 14 0:6 / /dev rw,nosuid,relatime - devtmpfs dev rw,size=10240k,nr_inodes=385148,mode=755
18 17 0:12 / /dev/mqueue rw,nosuid,nodev,noexec,relatime - mqueue mqueue rw
19 17 0:11 / /dev/pts rw,nosuid,noexec,relatime - devpts devpts rw,gid=5,mode=620
20 17 0:15 / /dev/shm rw,nosuid,nodev,noexec,relatime - tmpfs shm rw
21 14 0:16 / /sys rw,nosuid,nodev,noexec,relatime - sysfs sysfs rw
22 21 0:17 / /sys/fs/cgroup rw,nosuid,nodev,noexec,relatime - tmpfs cgroup_root rw,size=10240k,mode=755
23 22 0:18 / /sys/fs/cgroup/openrc rw,nosuid,nodev,noexec,relatime - cgroup openrc rw,release_agent=/lib64/rc/sh/cgroup-release-agent.sh,name=openrc
24 14 0:19 / /var/tmp/portage rw,noatime - tmpfs none rw,size=1048576k
25 14 8:2 /etc/bind /chroot/dns/etc/bind rw,noatime - ext4 /dev/sda2 rw,data=ordered
26 14 8:2 /var/bind /chroot/dns/var/bind rw,noatime - ext4 /dev/sda2 rw,data=ordered
27 14 8:2 /var/log/named /chroot/dns/var/log/named rw,noatime - ext4 /dev/sda2 rw,data=ordered

vs5-dns ~ # df
Filesystem     1K-blocks    Used Available Use% Mounted on
/var/log/named  10138552 2222224   7378268  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
vs5-dns ~ #