On Thu, Jul 12, 2012 at 10:02:42AM -0700, Paul E. McKenney wrote: > On Fri, Jul 13, 2012 at 12:57:38AM +0800, Fengguang Wu wrote: > > On Thu, Jul 12, 2012 at 09:43:08AM -0700, Paul E. McKenney wrote: > > > On Wed, Jul 11, 2012 at 12:49:24AM -0700, Paul E. McKenney wrote: > > > > On Tue, Jul 10, 2012 at 12:47:00PM +0800, Fengguang Wu wrote: > > > > > Hi Paul, > > > > > > > > > > Fortunately this bug is bisectable and the first bad commit is: > > > > > > > > > > commit 9b2e4f1880b789be1f24f9684f7a54b90310b5c0 > > > > > Author: Paul E. McKenney <paul.mcken...@linaro.org> > > > > > Date: Fri Sep 30 12:10:22 2011 -0700 > > > > > > > > > > rcu: Track idleness independent of idle tasks > > > > > > > > OK, there is a problem in TINY_RCU's handling of dyntick-idle: it > > > > traces while in idle. The confusion on my part was that in TREE_RCU, > > > > the nesting and dyntick-idle indication are different, while in > > > > TINY_RCU they are one and the same. > > > > > > > > Does the following patch help? > > > > > > This one failed in my testing. Please see the end for the fixed > > > version, with on small but important change. > > > > It worked, thanks! > > > > Tested-by: Fengguang Wu <w...@linux.intel.com> > > Very good! (And please ignore my resend of the same patch.) > > I will queue this.
Will you recommend it for -stable? It impacts 3.3/3.4. I tested it on 3.4 and it works fine. However for 3.3, the patch cannot apply cleanly. Thanks, Fengguang -- 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/
