Re: [Emacs-diffs] master 5c9304e: Disable some display optimizations when frames need redisplay

[Eli Zaretskii <eliz@gnu.org>]

> From: Stefan Monnier <monnier@iro.umontreal.ca>
> Cc: emacs-devel@gnu.org
> Date: Sat, 03 Oct 2015 22:33:06 -0400
> 
> > Tell you what: if you add commentary that describes the logic of using
> > these two variables, the window's and frame's 'redisplay' flags, and
> > how all those are used to decide which parts need to be redisplayed,
> > and if that commentary makes it clear that the code I added is
> > redundant, I will remove the code I added, and see if some alternative
> > design would be better.  Deal?
> 
> How do you like the patch below?

I like it very much, thanks!  Please commit.

Bonus points for adding something that describes where these variables
and the corresponding 'redisplay' flags are checked, because the
FOR_EACH_FRAME loop in redisplay_internal doesn't look at the
'redisplay' flags, so a large part of the logic you describe above
isn't (easily) visible at that level.