Re: autoclean mode for tmpfs

[David Holland <dholland-tech%netbsd.org@localhost>]

On Tue, Aug 09, 2011 at 07:13:44PM +0200, Emmanuel Dreyfus wrote:
 > > > Yes, a TTL attribute on an inode: once it expires, the filesystem tosses
 > > > the file on next access attempt.
 > > 
 > > If it were done at the next directory listing attempt, it would make
 > > more sense (and the removed file should not be reported as present of
 > > course). In the mean time, a program which may have created the file and
 > > remembered its name, may still access it past the expiration date if it
 > > is lucky (i.e., nobody looked - a quantum file system where observation
 > > changes the files).
 > 
 > Well, I meant on the next lookup, actually, but readdir should also kill
 > it. This is probably too complicated.

Quite a bit more complicated than just arming a timeout for every
vnode or something like that, yes...

-- 
David A. Holland
dholland%netbsd.org@localhost