Subject: Re: interrupt stack red zones
To: Martin Husemann <martin@duskware.de>
From: Andrew Doran <ad@netbsd.org>
List: port-i386
Date: 08/19/2007 15:42:27
On Sun, Aug 19, 2007 at 11:29:10AM +0200, Martin Husemann wrote:

> On Sun, Aug 19, 2007 at 11:21:04AM +0200, Quentin Garnier wrote:
> > Please don't use negative options.  So please name it "REDZONE" and
> > if/when you commit, add it to the relevant std configuration file.
> 
> Well, the option already exists ;-)
> 
> I don't realy understand why anyone would ever want to turn redzones off
> though.

With lots of threads, the redzones burn a lot of kernel VA. Mind you,
there's only one interrupt stack per-CPU so it hardly seems worthwhile
making _that_ conditional.

Andrew