On Tue, Jun 12, 2018 at 10:51:12AM +0300, Alexander Shishkin wrote: > If the PMU is used for AUX data sampling, the hardware event that triggers > it may come in during a critical section of address filters adjustment (if > it's delivered as NMI) and in turn call the address filter sync code, > causing a spinlock recursion.
Can you detail that a little more? How can sampling _ever_ get down that path?
