Messages in this thread | | | Date | Thu, 7 May 2015 19:06:26 +0200 | From | Peter Zijlstra <> | Subject | Re: pmu_dev_alloc; warning at at kernel/locking/lockdep.c:3002 lockdep_init_map |
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On Thu, May 07, 2015 at 05:29:57PM +0100, Tvrtko Ursulin wrote: > >>> May 7 11:58:20 skl kernel: [ 6.066696] futex hash table entries: 1024 (order: 5, 131072 bytes)
> >>> May 7 11:58:20 skl kernel: [ 6.329549] HugeTLB registered 2 MB page size, pre-allocated 0 pages
> > sysfs by default uses lockdep key embedded in attrs. It looks like > > somebody is making on-heap copies of attrs and using them as the group > > attrs. What's the offending pmu type? > > I am not familiar with this area, is this the answer?
Nope, that's way before you get the fail. initcall_debug might get you the right answer, but I suspect its the intel_uncore driver.
I see arch/x86/kernel/cpu/perf_event_intel_uncore.c:uncore_type_init() do exactly what TJ says, its dynamically allocating struct attribute.
Now, let me try and trigger that locally, that should not be skylake specific at all.
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