bug#21952: 24.5; auto-revert-tail-mode doesn't work (perhaps because of nfs)

[Dan Dever]

On 08/23/2016 04:22 AM, Michael Albinus wrote:
> When autorevert detects a file on a known mount location,
> `auto-revert-use-notify' is set to nil per default. See
> `auto-revert-notify-exclude-dir-regexp', which uses
>
> (regexp-opt '("/afs/" "/media/" "/mnt" "/net/" "/tmp_mnt/"))
>
> Perhaps, the file Dan wants to watch is mounted somewhere else. In this
> case I recommend to extend that variable.
>
> Dan, could you check whether this works for you?

This does work (tried it on emacs-25.0.95).

I prefer just setting auto-revert-use-notify to nil, however, since we'd never 
be using auto-revert on locally mounted files anyways.  But thanks for 
mentioning the alternative.

What also works is the configuration switch that we recently discovered (and have used to 
build 25.1-rc1/-rc2): "--with-file-notification=no".

I'm not sure I understand the preference for using a file notification utility 
by default for auto-revert when that utility only works on locally mounted 
files.  I haven't worked in an environment where our storage has been locally 
mounted in decades, and I've never had a reason to use auto-revert at home.

Thanks,
Dan