verbose kernel debug

verbose kernel debug

[Jon Smirl]

I'm getting a "Badness at c01cc228 [verbose debug info unavailable]"

How do I turn on verbose debug support? Or is it helpful? I see the
option for x86 but I don't see how to do it for PowerPC.

-- 
Jon Smirl
jonsmirl@gmail.com

Re: verbose kernel debug

[Scott Wood]

Jon Smirl wrote:
> I'm getting a "Badness at c01cc228 [verbose debug info unavailable]"
> 
> How do I turn on verbose debug support? Or is it helpful? I see the
> option for x86 but I don't see how to do it for PowerPC.

Under "Kernel Hacking", enable "Kernel debugging".  This will expose a 
"Verbose BUG() reporting" option.

IMHO, this option shouldn't be buried in this manner; it's not just for 
hacking kernels, but also for submitting decent bug reports.

-Scott

Re: verbose kernel debug

[Jon Smirl]

On 7/29/08, Scott Wood <scottwood@freescale.com> wrote:
> Jon Smirl wrote:
>
> > I'm getting a "Badness at c01cc228 [verbose debug info unavailable]"
> >
> > How do I turn on verbose debug support? Or is it helpful? I see the
> > option for x86 but I don't see how to do it for PowerPC.
> >
>
>  Under "Kernel Hacking", enable "Kernel debugging".  This will expose a
> "Verbose BUG() reporting" option.
>
>  IMHO, this option shouldn't be buried in this manner; it's not just for
> hacking kernels, but also for submitting decent bug reports.

I looked in there. The option is not appearing for my MPC5200.

>
>  -Scott
>


-- 
Jon Smirl
jonsmirl@gmail.com

Re: verbose kernel debug

[Grant Likely]

On Tue, Jul 29, 2008 at 07:12:58PM -0400, Jon Smirl wrote:
> On 7/29/08, Scott Wood <scottwood@freescale.com> wrote:
> > Jon Smirl wrote:
> >
> > > I'm getting a "Badness at c01cc228 [verbose debug info unavailable]"
> > >
> > > How do I turn on verbose debug support? Or is it helpful? I see the
> > > option for x86 but I don't see how to do it for PowerPC.
> > >
> >
> >  Under "Kernel Hacking", enable "Kernel debugging".  This will expose a
> > "Verbose BUG() reporting" option.
> >
> >  IMHO, this option shouldn't be buried in this manner; it's not just for
> > hacking kernels, but also for submitting decent bug reports.
> 
> I looked in there. The option is not appearing for my MPC5200.

Hmmm, I can see it right now on a 5200 configured kernel.  It's right
before "Compile the kernel with debug info" option.

It also helps to make sure CONFIG_EMBEDDED is disabled, or if it is
enabled that CONFIG_KALLSYMS is enabled.

g.

Re: verbose kernel debug

[Jon Smirl]

On 7/29/08, Grant Likely <grant.likely@secretlab.ca> wrote:
> On Tue, Jul 29, 2008 at 07:12:58PM -0400, Jon Smirl wrote:
>  > On 7/29/08, Scott Wood <scottwood@freescale.com> wrote:
>  > > Jon Smirl wrote:
>  > >
>  > > > I'm getting a "Badness at c01cc228 [verbose debug info unavailable]"
>  > > >
>  > > > How do I turn on verbose debug support? Or is it helpful? I see the
>  > > > option for x86 but I don't see how to do it for PowerPC.
>  > > >
>  > >
>  > >  Under "Kernel Hacking", enable "Kernel debugging".  This will expose a
>  > > "Verbose BUG() reporting" option.
>  > >
>  > >  IMHO, this option shouldn't be buried in this manner; it's not just for
>  > > hacking kernels, but also for submitting decent bug reports.
>  >
>  > I looked in there. The option is not appearing for my MPC5200.
>
>
> Hmmm, I can see it right now on a 5200 configured kernel.  It's right
>  before "Compile the kernel with debug info" option.
>
>  It also helps to make sure CONFIG_EMBEDDED is disabled, or if it is
>  enabled that CONFIG_KALLSYMS is enabled.

More needs to be selected, I still can't get it to appear.

I'm digging through Kconfig....


>
>
>  g.
>
>


-- 
Jon Smirl
jonsmirl@gmail.com

Re: verbose kernel debug

[Jon Smirl]

Why isn't PowerPC in the depends on?

config DEBUG_BUGVERBOSE
	bool "Verbose BUG() reporting (adds 70K)" if DEBUG_KERNEL && EMBEDDED
	depends on BUG
	depends on ARM || AVR32 || M32R || M68K || SPARC32 || SPARC64 || \
		   FRV || SUPERH || GENERIC_BUG || BLACKFIN || MN10300
	default !EMBEDDED
	help
	  Say Y here to make BUG() panics output the file name and line number
	  of the BUG call as well as the EIP and oops trace.  This aids
	  debugging but costs about 70-100K of memory.


-- 
Jon Smirl
jonsmirl@gmail.com

Re: verbose kernel debug

[Jon Smirl]

I finally figured out the right combo to turn it on. I was expecting
it to appear in the "Kernel Debugging" section but it was appearing
down lower.

Seems like this option should be defaulted on no matter what, and then
turn it off to save memory. It was the interaction with
CONFIG_EMBEDDED that confused me.

-- 
Jon Smirl
jonsmirl@gmail.com