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Date: Fri, 24 Oct 2014 11:33:23 -0700 From: "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com> To: Jay Vosburgh <jay.vosburgh@...onical.com> Cc: Yanko Kaneti <yaneti@...lera.com>, Josh Boyer <jwboyer@...oraproject.org>, "Eric W. Biederman" <ebiederm@...ssion.com>, Cong Wang <cwang@...pensource.com>, Kevin Fenzi <kevin@...ye.com>, netdev <netdev@...r.kernel.org>, "Linux-Kernel@...r. Kernel. Org" <linux-kernel@...r.kernel.org> Subject: Re: localed stuck in recent 3.18 git in copy_net_ns? On Fri, Oct 24, 2014 at 11:20:11AM -0700, Jay Vosburgh wrote: > Paul E. McKenney <paulmck@...ux.vnet.ibm.com> wrote: > > >On Thu, Oct 23, 2014 at 09:48:34PM -0700, Jay Vosburgh wrote: > >> Paul E. McKenney <paulmck@...ux.vnet.ibm.com> wrote: > [...] > >> >Either way, my patch assumed that 39953dfd4007 (rcu: Avoid misordering in > >> >__call_rcu_nocb_enqueue()) would work and that 1772947bd012 (rcu: Handle > >> >NOCB callbacks from irq-disabled idle code) would fail. Is that the case? > >> >If not, could you please bisect the commits between 11ed7f934cb8 (rcu: > >> >Make nocb leader kthreads process pending callbacks after spawning) > >> >and c847f14217d5 (rcu: Avoid misordering in nocb_leader_wait())? > >> > >> Just a note to add that I am also reliably inducing what appears > >> to be this issue on a current -net tree, when configuring openvswitch > >> via script. I am available to test patches or bisect tomorrow (Friday) > >> US time if needed. > > > >Thank you, Jay! Could you please check to see if reverting this commit > >fixes things for you? > > > >35ce7f29a44a rcu: Create rcuo kthreads only for onlined CPUs > > > >Reverting is not a long-term fix, as this commit is itself a bug fix, > >but would be good to check to see if you are seeing the same thing that > >Yanko is. ;-) > > Just to confirm what Yanko found, reverting this commit makes > the problem go away for me. Thank you! I take it that the patches that don't help Yanko also don't help you? Thanx, Paul -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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