[Crash-utility] timer: invalid list entry: 1 [ ARM ]

[Mika Westerberg]

On Mon, Mar 04, 2013 at 11:34:55AM -0500, Dave Anderson wrote:
> > crash> bt -a
> > PID: 0 TASK: c097b8b0 CPU: 0 COMMAND: "swapper/0"
> > bt: WARNING: cannot get stackframe for task
> >
> > PID: 0 TASK: dc84ca40 CPU: 1 COMMAND: "swapper/1"
> > bt: WARNING: cannot get stackframe for task
> 
> Yeah, it appears that the ARM backtrace code presumes that the dumpfile
> was taken with the kernel's kdump facility, because it gets the backtrace
> starting points from the register values save in the kdump "crash_notes".  

Right, only the mainline kernel kdump is supported.

> So you might try entering "bt -t" or "bt -T".  But if the cpus were
> sitting in the idle state, there's probably not much to see.
> 
> One thing I do *not* like about the ARM "bt" display is that it
> does not show the stack address of each frame.  But I think the
> ARM maintainers did it that way to simulate the kernel's log
> output.

Exactly - we try to keep the resulting backtrace match what is printed to the
console and to the log.