> As you can see the notail-option of reiserfs isn't listed on /proc/mounts,
> but it is on "mount".
>
> Does this have any particular reason?
mount writes everything to /etc/mtab and displays that when asked.
The kernel doesn't ask the individual filesystem "drivers" if they have
some options they would like to list there. So for /proc it simply lists
the options the VFS knows about. Except for NFS that for some reson has
code there.
I don't know if there are any plans to change that. Wouldn't be difficult
to add something to super_operations.
fs/namespace.c:
show_vfsmnt
show_nfs_mount
If it is important to you, you could add a "show_reiserfs_mount" by
copying how things are done for nfs.
/Urban
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