Re: [PATCH 1/5] signal(x86_32): Improve the signal stack overflowcheck

[Paul Mackerras]

Ingo Molnar writes:
> 
> * Shi Weihua <shiwh@xxxxxxxxxxxxxx> wrote:
> 
> > We need to check for stack overflow only when the signal is on stack. 
> > So we can improve the patch "http://lkml.org/lkml/2007/11/27/101"; as 
> > following.
> 
> thanks, applied.

These patches change the behaviour of programs that longjmp out of a
signal handler on an alternate stack, don't they?

I'm interested to know what gave you confidence that changing that
behaviour won't break existing working programs.

Paul.
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