From: itojun@iijlab.net
Subject: Re: kernel stack overflow detection 
Date: Wed, 26 Jun 2002 20:21:12 +0900
> >i'll commit this if no one objects.
> >http://www2q.biglobe.ne.jp/~yama/file/kstack/kstack4.diff
> 
> 	i bet you will make it on by default in the future (after testing)
> 	i guess?  am i right?
> 	(there are way too many options, so i would like to see fewer options)

it's one of debug/diagnostic options.
(eg. LOCKDEBUG, MALLOC_DEBUG, etc...)
do you mean they should be merged into one, DIAGNOSTIC?

i separated options from DIAGNOSTIC because of
following reasons:

KSTACK_CHECK_MAGIC scans kernel stack on each context switch.
so it affects performance too much.

KSTACK_CHECK_DR0 uses a debug register exclusively, so
people that want to use it for other purposes will not want to
enable it.

---
YAMAMOTO Takashi<yamt@mwd.biglobe.ne.jp>