Re: [PATCH AUTOSEL 5.9 28/39] intel_idle: Fix intel_idle() vs tracing

Peter Zijlstra
2020-12-03T17:11:27Z

On Thu, Dec 03, 2020 at 08:28:22AM -0500, Sasha Levin wrote:
> From: Peter Zijlstra <peterz@infradead.org>
>
> [ Upstream commit 6e1d2bc675bd57640f5658a4a657ae488db4c204 ]
>
> cpuidle->enter() callbacks should not call into tracing because RCU
> has already been disabled. Instead of doing the broadcast thing
> itself, simply advertise to the cpuidle core that those states stop
> the timer.
>
> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
> Link: https://lkml.kernel.org/r/20201123143510.GR3021@hirez.programming.kicks-ass.net
> Signed-off-by: Sasha Levin <sashal@kernel.org>

This patch has a known compile issue, fix is pending.