Re: Autofs: Need UID & VFS hook, security notice

[Richard Stallman]

    > Condition 3 needs a VFS hook, I believe.  Yes, autofs will auto unmount
    > after a specific amount of time, but after ejecting the floppy, I can
    > still do a 'ls'.  The buffer cache should be cleared when it is ejected,
    > and I believe the VFS gets this signal.  It does when a CD-ROM is
    > inserted/ejected for sure.  Even if I replace the floppy with another,
    > this cache remains intact, which is then just wrong.
    > 
    > Do these changes seem reasonable, and if a VFS change is required,
    > possible before the release of kernel 2.4?
    > 

    Not a chance in hell.  Putting it in the VFS would slow down *every
    access*, even to non-removable devices.

Why would a VFS feature for handling ejection slow things down even
when ejection does not occur?