Messages in this thread | | | Date | Mon, 14 Sep 2009 11:28:34 +0200 | From | Jiri Slaby <> | Subject | Re: clocksource: !keventd_up() && schedule_work() == oops |
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On 09/09/2009 10:00 AM, Jiri Slaby wrote: > Hi, > > I started to see oopses on boot in qemu machine because keventd is > created in kernel_init/do_basic_setup, but schedule_work is done earlier > in kernel_init/smp_init[1] when the tsc is unstable during this early phase. > > It looks like "clocksource: Resolve cpu hotplug dead lock with TSC > unstable" is the culprit. > > Creating its own either singlethread or "multithread" workqueue won't > work either (we do not have singlethread_cpu and cpu_populated_map). > Checking !keventd_up() in the clocksource code looks to me like a hack. > Any ideas, please?
Still present in mmotm 2009-09-14-01-57.
> [1] > kernel_init/smp_init/cpu_up/native_cpu_up/check_tsc_sync_source/mark_tsc_unstable/clocksource_mark_unstable/__clocksource_unstable
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