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

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From: Michael Albinus <michael.albinus <at> gmx.de>
To: Mattias Engdegård <mattiase <at> acm.org>
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: Sat, 04 May 2019 18:53:07 +0200

Mattias Engdegård <mattiase <at> acm.org> writes:

Hi Mattias,

> +  By default, Auto Revert mode will poll files for changes
> +periodically even when file notifications are used.  Polling is
> +unnecessary in many cases, and turning it off may save power by
> +relying on notifications only.  To do so, set the variable
>  @code{auto-revert-avoid-polling} to non-@code{nil}.  However,
>  notification is ineffective on certain file systems; mainly network
>  file system on Unix-like machines, where files can be altered from
> +other machines.  For such file systems, polling may be necessary.

Maybe we could also add the other major reason why polling is necessary:
file notification is not supported for all types of remote file systems
(Tramp).

Best regards, Michael.

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