Messages in this thread | | | Date | Wed, 12 Feb 2020 22:01:39 +0100 | From | Peter Zijlstra <> | Subject | [PATCH v2 0/9] tracing vs rcu vs nmi |
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Hi all,
These here patches are the result of Mathieu and Steve trying to get commit 865e63b04e9b2 ("tracing: Add back in rcu_irq_enter/exit_irqson() for rcuidle tracepoints") reverted again.
One of the things discovered is that tracing MUST NOT happen before nmi_enter() or after nmi_exit(). Audit results of the previous version are still valid.
Changes since -v1:
- Added tags - Changed #4; changed nmi_enter() to use __preempt_count_add() vs marking preempt_count_add() notrace. - Changed #5; confusion on which functions are notrace due to Makefile - Added #9; remove limitation on the perf-function-trace coupling
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