Messages in this thread | | | Date | Wed, 24 Jun 2015 23:29:30 +0200 | From | Peter Zijlstra <> | Subject | Re: [PATCH] ARM64: smp: Silence suspicious RCU usage with ipi tracepoints |
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On Wed, Jun 24, 2015 at 01:14:18PM -0700, Stephen Boyd wrote: > John Stultz reported an RCU splat on ARM with ipi trace events > enabled. It looks like the same problem exists on ARM64. > > At this point in the IPI handling path we haven't called > irq_enter() yet, so RCU doesn't know that we're about to exit > idle and properly warns that we're using RCU from an idle CPU. > Use trace_ipi_entry_rcuidle() instead of trace_ipi_entry() so > that RCU is informed about our exit from idle.
I have a problem with $subject. It says 'silence', whereas afaict this fixes an actual bug, so it should be 'fixes'.
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