Messages in this thread | | | Date | Wed, 16 Nov 2005 07:42:06 -0700 | From | jmerkey <> | Subject | Re: [2.6 patch] i386: always use 4k stacks |
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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.
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