Re: Kernel panic on Lenovo X60 with tracing enabled

[Paul Menzel]

On 2017-03-09 17:29, Steven Rostedt wrote:
> On Thu, 9 Mar 2017 10:16:02 -0600
> Josh Poimboeuf wrote:
>
> > On Thu, Mar 09, 2017 at 09:36:30AM -0500, Steven Rostedt wrote:
> > > On Thu, 9 Mar 2017 13:12:28 +0100
> > > Paul Menzel wrote:

> > > > Hopefully, I am contacting the right people for my issue.
> > > >
> > > > Suspending a system with Linux 4.9.13 with tracing enabled, it fails
> > > > with the screen still enabled, and the LED blinking. Attaching a serial
> > > > console to the dock, shows the messages below.
> > >
> > > I'm betting this is a compiler bug, as that bug that printed is the
> > > internal ftrace check for it. (note the bug is only in x86-32 not
> > > x86-64)
> > >
> > > Funny, we are just talking about this bug in another thread, but with a
> > > different symptom.
> > >
> > > Josh, did you say this goes away if you disable optimize for size or
> > > does it need to be enabled?
> >
> > Yeah, assuming it's the same problem, then this is caused by
> > CONFIG_CC_OPTIMIZE_FOR_SIZE.  It would be fixed by changing it to
> > CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE.
>
> Paul, do you have CONFIG_CC_OPTIMIZE_FOR_SIZE enabled? Can you set it
> to PERFORMANCE and see if the problem goes away?

As far as I can see, the Debian Linux kernel is built with 
`CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE=y`.

So it might be a different problem?


Kind regards,

Paul