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I've had a quick look and i'm confused already.
start_secondary() is the entry point to start up the non boot CPU on
SMP systems, and i can't see where cpu_startup_entry() manages to call
schedule_preempt_disabled() its probably inline code somewhere as that
is part of a mutex locking operation. I can't see directly a driver
involved.
So this looks like a kernel issue for SMP systems? Which begs the
question why are you getting this multiple times, this is a CPU
startup function? Any clever power management that can sleep
CPUs/cores and this is wake up related?
You could try installing the full kernel symbols package, it may give
a slightly better stack trace
On 17 June 2016 at 14:45, Adrian Midgley <amidgley@xxxxxxxxx> wrote:
> Kernel, or a driver for something, if so how should I approach identifying
> the culprit, please?
>
> I've had a few sudden halts, associated with moving the edge of a frame of
> eg Iceweasel --> Firefox-esr or Gimp in the Gnome desktop with the (USB)
> mouse.
> I think they are less with the current version of NVidia's proprietary
> driver controlling the 4-headed video card and four monitors you may recall
> me mentioning earlier.
>
> (BTW, if anyone wants a couple of 2-headed NVidia cards which are very nice
> but don't go up to the largest resolutions with DVI, a very small token
> would secure them.)
>
> On Fri, 17 Jun 2016 at 14:41 Robin Cornelius <robin.cornelius@xxxxxxxxx>
> wrote:
>>
>> Driver bug, Its a warning that the kernel driver is attempting to
>> sleep in the idle thread (which should be non blocking code only) and
>> not try to sleep etc.
>>
>> It is only a warning so is non fatal but i guessing its a ripe way to
>> a deadlock situation with the idle thread stalled waiting for
>> something else to occur.
>>
>>
>>
>> On 17 June 2016 at 13:30, Simon Waters <simon@xxxxxxxxxxxxxx> wrote:
>> > If it works worry a little, if it breaks worry a lot.
>> >
>> > I'd probably try a newer kernel package, or an older one, first. See if
>> > it persists, ilunless you know what triggers it.
>> >
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