From mboxrd@z Thu Jan  1 00:00:00 1970
From: Al Viro <viro@ZenIV.linux.org.uk>
Subject: Re: inotify/sysfs
Date: Mon, 31 Mar 2014 21:00:19 +0100
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Cc: Quentin Glidic <sardemff7+linux@sardemff7.net>,
	linux-fsdevel <linux-fsdevel@vger.kernel.org>,
	Michael Kerrisk <mtk.manpages@gmail.com>
To: Linus Torvalds <torvalds@linux-foundation.org>
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On Mon, Mar 31, 2014 at 12:13:10PM -0700, Linus Torvalds wrote:
> On Mon, Mar 31, 2014 at 11:52 AM, Al Viro <viro@zeniv.linux.org.uk> wrote:
> >
> > Linus, what do you think about flat-out refusing to create the watches on
> > filesystems that can't support them?
> 
> Well, you seem to think that NFS and other network filesystems can't
> support them.
> 
> But they can. It's just that they'll only trigger on *local* changes,
> not on remote changes. But if you're doing a file manager on a
> workstation, triggering on local changes is generally exactly what you
> want.

... except when that workstation has e.g. /var/spool/mail NFS-mounted, with
MTA running on server.  Or "wait until the job on server puts its results
into this file".  And yes, I've seen requests along those lines ;-/
Cluster filesystems have the same issue...