Re: Kernel panic on Lenovo X60 with tracing enabled

From: Paul Menzel
Date: Thu Mar 09 2017 - 15:43:54 EST

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

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,