linux-kernel - Re: Error in save_stack_trace() on x86

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Message-ID: <48274FF2.8040202@linux.intel.com>
Date:	Sun, 11 May 2008 12:58:42 -0700
From:	Arjan van de Ven <arjan@...ux.intel.com>
To:	Vegard Nossum <vegard.nossum@...il.com>
CC:	Ingo Molnar <mingo@...e.hu>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: Error in save_stack_trace() on x86_64?

Vegard Nossum wrote: in userspace this trace looks correct.
> 
> No, it is happening from kernel code. As you can see from the original
> backtrace, the regs->ip (RIP) (regs taken from the very same
> do_page_fault()) points at add_uevent_var, which is a kernel function.
> 
>>  if it happens in kernel space... I wonder if the separate exception stack
>> thing
>>  is hurting us with the stacks not being properly connected...
>>  (but oopses and the like seem to come out just fine so I kinda doubt you're
>> hitting that)
>>
> 
> Thanks for looking into this.
> 

do you happen to have something that I maybe can reproduce?
(if you have that it would save me a ton of time in reproducing)
> 
> Vegard
> 

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