Thomas Meyer napsal(a): > 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.
Hmmmm, both variants (nohz=off or recompiled kernel without NO_HZ) works for me. Milan - 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/
