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SubjectRe: hotplug lockdep splat (tip)
On Sun, Sep 03, 2017 at 08:59:35AM +0200, Mike Galbraith wrote:
>
> [ 126.626908] Unregister pv shared memory for cpu 1
> [ 126.631041]
> [ 126.631269] ======================================================
> [ 126.632442] WARNING: possible circular locking dependency detected
> [ 126.633599] 4.13.0.g06260ca-tip-lockdep #2 Tainted: G E
> [ 126.634380] ------------------------------------------------------
> [ 126.635124] stress-cpu-hotp/3156 is trying to acquire lock:
> [ 126.635804] ((complete)&st->done){+.+.}, at: [<ffffffff8108d19a>] takedown_cpu+0x8a/0xf0
> [ 126.636809]
> [ 126.636809] but task is already holding lock:
> [ 126.637567] (sparse_irq_lock){+.+.}, at: [<ffffffff81107ac7>] irq_lock_sparse+0x17/0x20
> [ 126.638665]

https://lkml.kernel.org/r/20170829193416.GC32112@worktop.programming.kicks-ass.net

I still need to write a coherent Changelog and comments for that :/

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