Re: PTP + H/W time stamping + CONFIG_PREEMPT_RT_FULL == Oops in slab

I suspect this isn't a time stamping bug, but rather that the time
stamping code just triggers the issue. My own experience has been that
preempt_rt on arm is quite shaky.

On Thu, Jun 21, 2012 at 08:09:11PM +0530, satpal parmar wrote:

I am not sure if this is the right mailing list. If anyone know better
forum please direct me to that.  Appreciate your patience and time.

Maybe lkml or rt-users would be better.

However, there are really too many variables, and I recommend first
narrowing the problem down. Here are a few ideas.

1. use a mainline kernel plus rt patch (without vendor/custom changes)
2. try to trigger issue without using ptpd2 (like stress testing)
3. write a simple test case (like sending a single PTP sync) and
   instrument your kernel

Good luck,
Richard