Re: [PATCH 1/7] perf_counter: fix dynamic irq_period logging

[Paul Mackerras]

Peter Zijlstra writes:

> We call perf_adjust_freq() from perf_counter_task_tick() which is is called
> under the rq->lock causing lock recursion.

What was the lock recursion?  I see perf_adjust_freq taking ctx->lock,
but we were careful not to take any rq->lock within a ctx->lock, at
least in the past.

Paul.
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