I mean it is certainly a bug to use 100% of a cpu just because a file that is in the same directory to a file you are editing is being written to, but it may not be unintentional behavior. On Tue, Oct 30, 2018 at 2:54 PM Justin Van Winkle < justin.vanwinkle@gmail.com> wrote: > Ok, in that case I wonder if this is actually a bug. > > On Tue, Oct 30, 2018 at 1:33 PM Eli Zaretskii wrote: > >> > From: Justin Van Winkle >> > Date: Tue, 30 Oct 2018 12:18:34 -0400 >> > Cc: michael.albinus@gmx.de, 33194@debbugs.gnu.org >> > >> > To clarify, I was not writing to a file that was open in emacs. In >> fact, emacs would use 100% cpu even with no >> > files opened, so long as global-auto-revert-mode was activated. >> >> That was clear. Like I said: auto-revert mode makes Emacs watch >> changes to _any_ file in that file's directory. >> >