Re: [2.6 patch] i386: always use 4k stacks

[jmerkey]

Jörn Engel wrote:

> On Wed, 16 November 2005 13:57:36 +0100, Andi Kleen wrote:
>  
>
> > I think it's in general risky. It's like balancing without a safety
> > net.  Might be a nice hobby, but for real production you want a safety
> > net.  That's simple because there are likely some code paths through
> > the code that need more stack space and that are rarely hit (and
> > cannot be easily found by static analysis, e.g. if they involve
> > indirect pointers or particularly complex configuration setups).
> >    
>
> It isn't that hard to find such places.  Trouble is that you find so
> many of them and it takes quite a while to go through them all.  Years
> is a good unit for "quite a while".
>
> Jörn
>
>  
Map a blank ro page beneath the address range when stack memory is 
mapped is trap on page faults to the page when folks go off the end of 
th e stack.

Easy to find.

Jeff
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