On Wed, May 15, 2013 at 01:04:01PM -0400, Steven Rostedt wrote: > On Wed, 2013-05-15 at 18:59 +0200, Peter Zijlstra wrote: > > > At which point we could run the watchdog without perf_event_task_tick(). > > At which point we can drop the disable LOCKUP_DETECTOR when NO_HZ_FULL > is enabled ;-) >
Can we? The thing I'm worried about is RCU (of course!). ISTR we rely on RCU working in NMI context. AFAIR for RCU to work, we need to come out of out magic NO_HZ state since that would've put RCU into EQS. Frederic, PaulMck? -- 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/
