when xfce4 is started (that is with regular user) i can see commit=0 option in mtab for ext4 partitions along with commit option set in fstab.

[g0ga@home ~]$ cat /etc/mtab
proc /proc proc rw,nosuid,nodev,noexec,relatime 0 0
sys /sys sysfs rw,nosuid,nodev,noexec,relatime 0 0
udev /dev devtmpfs rw,nosuid,relatime,size=10240k,nr_inodes=505945,mode=755 0 0
run /run tmpfs rw,nosuid,nodev,noexec,relatime,size=10240k 0 0
/dev/disk/by-uuid/d168bee5-53a2-425c-97f3-6354035956a9 / ext4 rw,noatime,errors=remount-ro,commit=60,commit=0 0 0
devpts /dev/pts devpts rw 0 0
shm /dev/shm tmpfs rw,nosuid,nodev 0 0
/dev/sda2 /home ext4 rw,noatime,commit=60,data=writeback,commit=0 0 0
/dev/sda3 /music ext4 rw,noatime,commit=500,commit=0 0 0
/dev/sdb1 /mnt/sdb1 reiserfs rw,noatime 0 0
none /proc/bus/usb usbfs rw,busgid=108,busmode=0775,devgid=108,devmode=0664 0 0
rpc_pipefs /var/lib/nfs/rpc_pipefs rpc_pipefs rw 0 0
fusectl /sys/fs/fuse/connections fusectl rw 0 0
gvfs-fuse-daemon /home/g0ga/.gvfs fuse.gvfs-fuse-daemon rw,nosuid,nodev,user=g0ga 0 0
[g0ga@home ~]$