Messages in this thread | | | Date | Tue, 08 Nov 2011 16:34:28 +0900 | From | HAYASAKA Mitsuo <> | Subject | Re: [RFC PATCH 0/5] x86: check stack overflows more reliably |
| |
Hi Pekka,
Thank you for your comments.
(2011/11/07 16:00), Pekka Enberg wrote: > On Mon, Nov 7, 2011 at 7:51 AM, Mitsuo Hayasaka > <mitsuo.hayasaka.hu@hitachi.com> wrote: >> (2) check stack overflow in detail >> Currently, only kernel stack is checked for the overflow, >> which is not sufficient for enterprise systems. To enhance >> reliability, expand stack overflow checking to IRQ and >> exception stacks optionally. This is disabled by default >> in Kconfig. > > This sounds useful. What's the reason for not enabling this by > default? Performance regressions?
I'm worried about performance regressions because this patch checks a stack overflow in detail.
However, I guess there is no problem for enabling it by default since this option is for debug and appears only if a DEBUG_STACKOVERFLOW option is enabled.
So, I'd like to send the revised patch if it does not have any further problem.
> Pekka > >
| |