Re: [PATCH][RFC] 4K stacks default, not a debug thing any more...?

Eric Sandeen
2007-07-27T13:36:33Z

Alan Cox wrote:
>> I don't think they're necessarily bugs. IMHO the WARN_ON is better off
>> at 7k level like it is today with the current STACK_WARN. 4k for a
>> stack for common code really is small. I doubt you're going to find
>
> You want the limit settable. On a production system you want to set the
> limit to somewhere appropriate for the stack size used. When debugging
> (eg to remove any last few bogus users of 8K stack space) you want to be
> able to set it to just under 4K

Hm, when cramming cxfs into 4k at sgi, I had a patch that did just that
for debugging (warn about encroaching on 4k without actually tipping
over, with a settable threshold...)

Maybe I should resurrect it & send it out...

(FWIW I think I recall that the warning itself sometimes tipped the
scales enough on 4k stacks to bring the box down)

-eric