bug#49261: 28.0.50; File Locking Breaks Presumptuous Toolchains

[Eli Zaretskii]

> From: Michael Albinus <michael.albinus@gmx.de>
> Cc: Lars Ingebrigtsen <larsi@gnus.org>,  ncaprisunfan@gmail.com,
>   49261@debbugs.gnu.org
> Date: Wed, 30 Jun 2021 18:07:41 +0200
> 
> And there is the case of remote files. Do we want locking of remote
> files?

I think we do.  maybe as an opt-in behavior?

> Should the respective lock file be local (better for performance) or
> also remote (better for locking a file being accessed from different
> Emacsen somewhere)?

Remote, I think, otherwise the lock can be easily ignored from another
machine.