On 12/01/2013 11:25 PM, Pavel Vasilyev wrote: > ------------[ cut here ]------------ > WARNING: CPU: 1 PID: 10 at kernel/time/tick-sched.c:191 0xffffffff8107bac6() > NO_HZ FULL will not work with unstable sched clock > Call Trace: > <IRQ> [<ffffffff81501a58>] 0xffffffff81501a58 > [<ffffffff8102f992>] 0xffffffff8102f992 Okay. Now we have a backstrace. Better. Now there is an option named CONFIG_DEBUG_INFO which resolves a number like 0xffffffff81501a58 to the function name. Without it enabled, the backtrace is of no use to me. However, in this case you triggered the warning in tick-sched.c. The good news is that FULL-NO-HZ mode is not available because your TSC is unstable and this is all the backtrace is about so it is harmless. You should see it even without -RT enabled. The bad news is that I don't think that this has anything to do with your SATA problem. Sebastian -- 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