Messages in this thread | | | Date | Mon, 15 Jun 2009 14:38:41 -0700 | From | "H. Peter Anvin" <> | Subject | Re: [tip:perfcounters/core] perf_counter: x86: Fix call-chain support to use NMI-safe methods |
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Mathieu Desnoyers wrote: > > As the maintainer of the out-of-tree LTTng tracer, which hooks in the > page fault handler with tracepoints, and which can build almost entirely > as modules, I am very tempted to argue that having the nmi-code entirely > robust wrt in-kernel page faults would be a very-nice-to-have feature. >
I doubt that is ever going to be reliable, due to reentrancy issues.
-hpa
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