lkml.org 
[lkml]   [2011]   [Nov]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [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
>
>



\
 
 \ /
  Last update: 2011-11-08 08:37    [W:0.178 / U:0.808 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site