On Sunday, 11 March 2007 21:28, Thomas Meyer wrote: > Rafael J. Wysocki schrieb: > > On Sunday, 11 March 2007 21:23, Milan Broz wrote: > > > >> Rafael J. Wysocki: > >> > >>> Ah, NO_HZ. Thomas Gleixner's address added to the Cc list. > >>> > >>> > >>>> short printk trace > >>>> > >>>> enable_nonboot_cpus > >>>> _cpu_up > >>>> raw_notifier_callchain (CPU_UP_PREPARE) > >>>> ... > >>>> update_sched_domains > >>>> detach_destroy_domains > >>>> [waits here] --> synchronize_sched (==synchronize_rcu) > >>>> > >>> Well, I think the call to wait_for_completion() does not return, probably > >>> because the task supposed to complete the completion is frozen at this > >>> point. Can you please try to confirm that it gets stuck on > >>> wait_for_completion() in synchronize_rcu()? > >>> > >> Yes, it's in wait_for_completion() in synchronize_rcu(). > >> As noted in some previous mail, it will wake up after > >> event - key press etc. > >> > >> Patch in http://lkml.org/lkml/2007/3/7/255 solves different problem. > >> I added it to my quilt and applied anyway -> no change. > >> > > > > Does the problem go away if NO_HZ is unset? > > > > i tried to boot with nohz=off, but the problem did persist.
Okay, but could you please compile the kernel without NO_HZ and retest? Rafael - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
