GNU bug report logs - #35418
[PATCH] Don't poll auto-revert files that use notification

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From: Mattias Engdegård <mattiase <at> acm.org>
To: Michael Albinus <michael.albinus <at> gmx.de>
Cc: Eli Zaretskii <eliz <at> gnu.org>, 35418 <at> debbugs.gnu.org
Subject: bug#35418: [PATCH] Don't poll auto-revert files that use notification
Date: Fri, 26 Apr 2019 22:46:56 +0200

24 apr. 2019 kl. 21.36 skrev Michael Albinus <michael.albinus <at> gmx.de>:
> 
> Inotify didn't work on mounted directories. I don't know whether this
> has improved.

By 'work', do you mean receiving notification about changes made by the same machine or another machine? As far as I know, the NFS protocol has no means of propagating notifications, in contrast to SMB.

> What might be an alternative is to let the user decide. If we provide a
> user option `auto-revert-dont-poll', a user could set it to t, and would
> live with the consequences. If she tries to enable autorevert for a
> mounted directory, which is not covered by file notifications, she might
> be surprised.

That is a possibility, although I'm generally not too fond of user-adjustable behaviour of this sort. If I understand you right, you propose that the default value should be 'always poll'?
I would prefer the default to be 'avoid polling' -- I doubt that malfunctions will be common or serious if they occur -- but I suppose it is better than the status quo.

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