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Message-Id: <200706220117.09966.arnd@arndb.de>
Date:	Fri, 22 Jun 2007 01:17:09 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	"C. Scott Ananian" <cscott@...top.org>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: inotify and /proc?

On Thursday 21 June 2007, C. Scott Ananian wrote:
> 
> I'd like to make a read-only /proc file which supports inotify -- that
> is, the kernel can send change notifications to userland via the
> inotify mechanism.  I've found fsnotify_modify() (in
> include/linux/fsnotify.h) which seems to do what I want, but it takes
> a struct dentry * -- how can I get a dentry from a struct
> proc_dir_entry and increment its ref count to keep it around?  Any
> help would be appreciated.  Thanks!

It sounds a little fishy to want that in the first place. If we wanted
inotify on /proc, it should work on all files I guess, but that's
an immense amount of work.

What file are you talking about in particular?
Why does it have to be in /proc?
Why not use another notification mechanism -- blocking read(), poll(),
uevent, ...?

	Arnd <><
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