[Samsung Gear S3] adfree:
Inspired from this Link:

https://www.linuxquestions.org/questions/linux-general-1/rootfs-as-shown-by-proc-mounts-4175606204/

For my Rooting "Adventure" I wish to know how rootfs rw work?

:confused:

I can not remount... like I did with SM-R732, SM-Z130H, SM-Z300H, RD-PQ and so on...

How Samsung can disable this feature?

:confused:

sh-3.2$ cat /proc/mounts
rootfs / rootfs rw 0 0
devtmpfs /dev devtmpfs rw,relatime,size=344568k,nr_inodes=86142,mode=755 0 0
sysfs /sys sysfs rw,nosuid,nodev,noexec,relatime 0 0
proc /proc proc rw,nosuid,nodev,noexec,relatime 0 0
/dev/mmcblk0p14 / ext4 ro,relatime,data=ordered 0 0
/dev/mmcblk0p12 /opt ext4 rw,nosuid,relatime,errors=panic,data=ordered 0 0
/dev/mmcblk0p10 /lib/modules ext4 ro,nosuid,nodev,noexec,relatime,data=ordered 0 0
securityfs /sys/kernel/security securityfs rw,nosuid,nodev,noexec,relatime 0 0
smackfs /sys/fs/smackfs smackfs rw,nosuid,nodev,noexec 0 0
tmpfs /dev/shm tmpfs rw,nosuid,nodev 0 0
devpts /dev/pts devpts rw,nosuid,noexec,relatime,gid=5,mode=620 0 0
tmpfs /run tmpfs rw,nosuid,nodev,mode=775,gid=1902 0 0
tmpfs /sys/fs/cgroup tmpfs rw,nosuid,nodev,noexec,mode=755 0 0
cgroup /sys/fs/cgroup/systemd cgroup rw,nosuid,nodev,noexec,relatime,xattr,release_agent=/usr/lib/systemd/systemd-cgroups-agent,name=systemd 0 0
pstore /sys/fs/pstore pstore rw,nosuid,nodev,noexec,relatime 0 0
cgroup /sys/fs/cgroup/cpu,cpuacct cgroup rw,nosuid,nodev,noexec,relatime,cpu,cpuacct 0 0
cgroup /sys/fs/cgroup/memory cgroup rw,nosuid,nodev,noexec,relatime,memory 0 0
cgroup /sys/fs/cgroup/freezer cgroup rw,nosuid,nodev,noexec,relatime,freezer 0 0
cgroup /sys/fs/cgroup/net_cls cgroup rw,nosuid,nodev,noexec,relatime,net_cls 0 0
debugfs /sys/kernel/debug debugfs rw,relatime 0 0
configfs /sys/kernel/config configfs rw,relatime 0 0
fusectl /sys/fs/fuse/connections fusectl rw,relatime 0 0
tmpfs /tmp tmpfs rw,nosuid,nodev,noexec,relatime 0 0
/dev/loop0 /usr/share/locale squashfs ro,relatime 0 0
smackfs /smack smackfs rw,relatime 0 0
/dev/mmcblk0p11 /opt/system/csc ext4 ro,nosuid,relatime,data=ordered 0 0
/dev/mmcblk0p2 /csa ext4 rw,nosuid,nodev,noexec,relatime,nodelalloc,data=journal 0 0
/dev/mmcblk0p13 /opt/usr ext4 rw,nosuid,relatime,discard,data=ordered 0 0
daemon_mgr /sys/fs/cgroup/mgr cgroup rw,nosuid,nodev,noexec,relatime,release_agent=/usr/bin/daemon-manager-release-agent,name=daemon_mgr 0 0
vip_cgroup /sys/fs/cgroup/vip cgroup rw,nosuid,nodev,noexec,relatime,release_agent=/usr/bin/vip-release-agent,name=vip_cgroup 0 0
/dev/mmcblk0p13 /opt/usr/media ext4 rw,nosuid,relatime,discard,data=ordered 0 0

sh-3.2$ ls -la /etc/mtab
lrwxrwxrwx 1 root root 19 Oct 17 2016 /etc/mtab -> ../proc/self/mounts

sh-3.2$ cat /etc/mtab
rootfs / rootfs rw 0 0
devtmpfs /dev devtmpfs rw,relatime,size=344568k,nr_inodes=86142,mode=755 0 0
sysfs /sys sysfs rw,nosuid,nodev,noexec,relatime 0 0
proc /proc proc rw,nosuid,nodev,noexec,relatime 0 0
/dev/mmcblk0p14 / ext4 ro,relatime,data=ordered 0 0
/dev/mmcblk0p12 /opt ext4 rw,nosuid,relatime,errors=panic,data=ordered 0 0
/dev/mmcblk0p10 /lib/modules ext4 ro,nosuid,nodev,noexec,relatime,data=ordered 0 0
securityfs /sys/kernel/security securityfs rw,nosuid,nodev,noexec,relatime 0 0
smackfs /sys/fs/smackfs smackfs rw,nosuid,nodev,noexec 0 0
tmpfs /dev/shm tmpfs rw,nosuid,nodev 0 0
devpts /dev/pts devpts rw,nosuid,noexec,relatime,gid=5,mode=620 0 0
tmpfs /run tmpfs rw,nosuid,nodev,mode=775,gid=1902 0 0
tmpfs /sys/fs/cgroup tmpfs rw,nosuid,nodev,noexec,mode=755 0 0
cgroup /sys/fs/cgroup/systemd cgroup rw,nosuid,nodev,noexec,relatime,xattr,release_agent=/usr/lib/systemd/systemd-cgroups-agent,name=systemd 0 0
pstore /sys/fs/pstore pstore rw,nosuid,nodev,noexec,relatime 0 0
cgroup /sys/fs/cgroup/cpu,cpuacct cgroup rw,nosuid,nodev,noexec,relatime,cpu,cpuacct 0 0
cgroup /sys/fs/cgroup/memory cgroup rw,nosuid,nodev,noexec,relatime,memory 0 0
cgroup /sys/fs/cgroup/freezer cgroup rw,nosuid,nodev,noexec,relatime,freezer 0 0
cgroup /sys/fs/cgroup/net_cls cgroup rw,nosuid,nodev,noexec,relatime,net_cls 0 0
debugfs /sys/kernel/debug debugfs rw,relatime 0 0
configfs /sys/kernel/config configfs rw,relatime 0 0
fusectl /sys/fs/fuse/connections fusectl rw,relatime 0 0
tmpfs /tmp tmpfs rw,nosuid,nodev,noexec,relatime 0 0
/dev/loop0 /usr/share/locale squashfs ro,relatime 0 0
smackfs /smack smackfs rw,relatime 0 0
/dev/mmcblk0p11 /opt/system/csc ext4 ro,nosuid,relatime,data=ordered 0 0
/dev/mmcblk0p2 /csa ext4 rw,nosuid,nodev,noexec,relatime,nodelalloc,data=journal 0 0
/dev/mmcblk0p13 /opt/usr ext4 rw,nosuid,relatime,discard,data=ordered 0 0
daemon_mgr /sys/fs/cgroup/mgr cgroup rw,nosuid,nodev,noexec,relatime,release_agent=/usr/bin/daemon-manager-release-agent,name=daemon_mgr 0 0
vip_cgroup /sys/fs/cgroup/vip cgroup rw,nosuid,nodev,noexec,relatime,release_agent=/usr/bin/vip-release-agent,name=vip_cgroup 0 0
/dev/mmcblk0p13 /opt/usr/media ext4 rw,nosuid,relatime,discard,data=ordered 0 0

sh-3.2$ mount
rootfs on / type rootfs (rw)
devtmpfs on /dev type devtmpfs (rw,relatime,size=344568k,nr_inodes=86142,mode=755)
sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,relatime)
proc on /proc type proc (rw,nosuid,nodev,noexec,relatime)
/dev/mmcblk0p14 on / type ext4 (ro,relatime,data=ordered)
/dev/mmcblk0p12 on /opt type ext4 (rw,nosuid,relatime,errors=panic,data=ordered)
/dev/mmcblk0p10 on /lib/modules type ext4 (ro,nosuid,nodev,noexec,relatime,data=ordered)
securityfs on /sys/kernel/security type securityfs (rw,nosuid,nodev,noexec,relatime)
smackfs on /sys/fs/smackfs type smackfs (rw,nosuid,nodev,noexec)
tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev)
devpts on /dev/pts type devpts (rw,nosuid,noexec,relatime,gid=5,mode=620)
tmpfs on /run type tmpfs (rw,nosuid,nodev,mode=775,gid=1902)
tmpfs on /sys/fs/cgroup type tmpfs (rw,nosuid,nodev,noexec,mode=755)
cgroup on /sys/fs/cgroup/systemd type cgroup (rw,nosuid,nodev,noexec,relatime,xattr,release_agent=/usr/lib/systemd/systemd-cgroups-agent,name=systemd)
pstore on /sys/fs/pstore type pstore (rw,nosuid,nodev,noexec,relatime)
cgroup on /sys/fs/cgroup/cpu,cpuacct type cgroup (rw,nosuid,nodev,noexec,relatime,cpu,cpuacct)
cgroup on /sys/fs/cgroup/memory type cgroup (rw,nosuid,nodev,noexec,relatime,memory)
cgroup on /sys/fs/cgroup/freezer type cgroup (rw,nosuid,nodev,noexec,relatime,freezer)
cgroup on /sys/fs/cgroup/net_cls type cgroup (rw,nosuid,nodev,noexec,relatime,net_cls)
debugfs on /sys/kernel/debug type debugfs (rw,relatime)
configfs on /sys/kernel/config type configfs (rw,relatime)
fusectl on /sys/fs/fuse/connections type fusectl (rw,relatime)
tmpfs on /tmp type tmpfs (rw,nosuid,nodev,noexec,relatime)
/usr/share/usr_share_locale.squash on /usr/share/locale type squashfs (ro,relatime)
smackfs on /smack type smackfs (rw,relatime)
/dev/mmcblk0p11 on /opt/system/csc type ext4 (ro,nosuid,relatime,data=ordered)
/dev/mmcblk0p2 on /csa type ext4 (rw,nosuid,nodev,noexec,relatime,nodelalloc,data=journal)
/dev/mmcblk0p13 on /opt/usr type ext4 (rw,nosuid,relatime,discard,data=ordered)
daemon_mgr on /sys/fs/cgroup/mgr type cgroup (rw,nosuid,nodev,noexec,relatime,release_agent=/usr/bin/daemon-manager-release-agent,name=daemon_mgr)
vip_cgroup on /sys/fs/cgroup/vip type cgroup (rw,nosuid,nodev,noexec,relatime,release_agent=/usr/bin/vip-release-agent,name=vip_cgroup)
/dev/mmcblk0p13 on /opt/usr/media type ext4 (rw,nosuid,relatime,discard,data=ordered)

This is from old LDU Firmware...

Will check newer Versions...

Best Regards

Edit 1.

sh-3.2$ cat /etc/fstab | grep root
tmpfs /tmp tmpfs nosuid,nodev,noexec,comment=havefs-smackfs-smackfsroot=* 0 0
/dev/disk/by-partlabel/rootfs / ext4 ro 0 1

Inspired by this Link...

https://access.redhat.com/solutions/2196881