Runqueue spinlock recursion on arm64 v4.15
From: peterz@infradead.org (Peter Zijlstra)
Date: 2018-02-02 19:55:30
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On Fri, Feb 02, 2018 at 07:27:04PM +0000, Mark Rutland wrote:
... in some cases, owner_cpu is -1, so I guess we're racing with an unlock. I only ever see this on the runqueue locks in wake up functions.
So runqueue locks are special in that the owner changes over a contex switch, maybe something goes funny there?