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

jmerkey
2005-11-16T15:08:19Z

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