lkml.org 
[lkml]   [2013]   [Jul]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: scheduling while atomic & hang.
On Fri, Jul 05, 2013 at 12:27:51PM -0700, Linus Torvalds wrote:
> On Thu, Jul 4, 2013 at 11:51 PM, Ingo Molnar <mingo@kernel.org> wrote:
> >
> > It would be nice to have a full-kernel-stack backtrace printout as an
> > option, which prints entries 'above' the current RSP.
>
> One problem with that is that it is likely to be mostly overwritten by
> the debug code that is about to print this all out - and any non-debug
> code may well be really old, just with a sufficiently deep stack trace
> to show up. Not to mention missing any irq-stack changes etc anyway.
>
> So it can easily be *very* misleading - I'm not sure how useful it
> would be as an idea.
>
> Linus

So if the unwider doesn't run with the same stak than the target,
it migh work. This can work with BUG for example But I believe that WARN
doesn't do a trap in x86.


\
 
 \ /
  Last update: 2013-07-06 11:01    [W:1.944 / U:0.244 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site