On Wed, 18 Jun 2014, Paul E. McKenney wrote: > > - both RCU stall detector and 'echo l > sysrq-trigger' can (and we've > > seen it happening for real) cause a complete, undebuggable, silent hang > > of machine (deadlock in NMI context) > > I could easily add an option to RCU to allow people to tell it not to > use NMIs to dump the stack. Would that help?
Well, that would make unfortunately the information provided by RCU stall detector rather useless ... workqueue-based stack dumping is very unlikely to point its finger to the real offender, as it'd be coming way too late. Thanks, -- Jiri Kosina SUSE Labs -- 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/
