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

From: Michael Albinus
Subject: bug#35418: [PATCH] Don't poll auto-revert files that use notification
Date: Mon, 13 May 2019 15:35:27 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux)

Mattias Engdegård <address@hidden> writes:

Hi Mattias,

> --- a/doc/emacs/arevert-xtra.texi
> +++ b/doc/emacs/arevert-xtra.texi
> address@hidden buffer-auto-revert-by-notification
> +Some non-file buffers can be updated reliably by file notification on
> +their default directory.  This can be indicated by setting
> address@hidden to a address@hidden value in
> +that buffer, allowing Auto Revert to avoid periodic polling.  Such
> +notification does not include changes to files in that directory, only
> +to the directory itself.

Do we want to say that this is related to a major mode in general? That
means, that the mode function shall set this variable. And do we want to
mention dired-mode as example?
> --- a/etc/NEWS
> +++ b/etc/NEWS
> +*** New variable 'buffer-auto-revert-by-notification'
> +Non-file buffers can explicitly declare that notification on their
> +default-directory is sufficient to know when updates are required by
> +setting the new variable `buffer-auto-revert-by-notification' to a
> +non-nil value in that buffer.  Auto Revert mode can use this
> +information to avoid polling the buffer periodically when
> +'auto-revert-avoid-polling' is non-nil.

Same remark. Mention major mode dependency.

Otherwise, the patch LGTM.

Best regards, Michael.

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