On Fri, 14 Nov 2014, Dave Jones wrote: > On Fri, Nov 14, 2014 at 11:55:30PM +0100, Thomas Gleixner wrote: > > > So this looks more like a smp function call fuckup. > > > > I assume Dave is running that stuff on KVM. So it might be worth while > > to look at the IPI magic there. > > no, bare metal.
Ok, but that does not change the fact that we are stuck in smp_function_call land. Enabling softlockup_all_cpu_backtrace will probably not help much as we will end up waiting for csd_lock again :( Is the machine still accesible when this happens? If yes, we might enable a few trace points and functions and read out the trace buffer. If not, we could just panic the machine and dump the trace buffer over serial. Sigh tglx -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/