On Wed, 14 Nov 2012, Grant Likely wrote: > Hey Thomas, > > I get a kernel bug when going from rt14 to rt15. It appears that > preempt_lazy on my ARM platform causes (or exposes) the following > backtrace on boot. I'm basing this on the only relevant change between > rt14 and rt15 is the typo fix that enables PREEMPT_LAZY. I also see > the problem on -rt16 and -rt17. > > (full boot log also attached below) > > The actual backtrace changes every time, but it is always related to > an rt_spin_lock() call. > > This is on a TI AM3894 platform which is equivalent to a TI8160 > without the DSP. The board support isn't mainlined, but there is > nothing particularly exotic about the changes. It is primarily device > drivers and device driver data. Cortex-A8 platform. > > Any thoughts on how to debug this? Probably by staring at the patch to the ASM code in arch/arm. I bet I messed that up somehow :) Thanks, tglx -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
