On Sun, Oct 07, 2012 at 09:03:11AM -0700, Paul E. McKenney wrote: > On Sun, Oct 07, 2012 at 05:47:11AM +0300, Kirill A. Shutemov wrote: > > Hi Paul and all, > > > > With commit 755609a9087fa983f567dc5452b2fa7b089b591f I've got deadlock on > > poweroff. > > > > It guess it happens because of race for cpu_hotplug.lock: > > > > CPU A CPU B > > disable_nonboot_cpus() > > _cpu_down() > > cpu_hotplug_begin() > > mutex_lock(&cpu_hotplug.lock); > > __cpu_notify() > > padata_cpu_callback() > > __padata_remove_cpu() > > padata_replace() > > synchronize_rcu() > > rcu_gp_kthread() > > get_online_cpus(); > > mutex_lock(&cpu_hotplug.lock); > > > > Have you seen the issue before? > > This is a new one for me. Does the following (very lightly tested) > patch help? Works for me. Thanks. -- Kirill A. Shutemov -- To unsubscribe from this list: send the line "unsubscribe linux-crypto" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
