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Re: [PATCH] ARM64: smp: Silence suspicious RCU usage with ipi tracepoints

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On 06/24/2015 02:29 PM, Peter Zijlstra wrote:
> 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'.

Fair enough. I can resend or whoever applies this patch can
s/Silence/Fix/ on the $subject.

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Re: [PATCH] ARM64: smp: Silence suspicious RCU usage with ipi  tracepoints Peter Zijlstra <peterz@infradead.org> - 2015-06-24 23:30 +0200
  Re: [PATCH] ARM64: smp: Silence suspicious RCU usage with ipi tracepoints Stephen Boyd <sboyd@codeaurora.org> - 2015-06-25 00:10 +0200
  Re: [PATCH] ARM64: smp: Silence suspicious RCU usage with ipi  tracepoints Steven Rostedt <rostedt@goodmis.org> - 2015-06-25 03:10 +0200

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