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    SubjectRe: [PATCH 09/10] perf: Remove more fastpath code
    On Fri, 2010-05-21 at 07:15 -0400, Steven Rostedt wrote:
    > > - if (WARN_ON_ONCE(((long)(handle->head - handle->offset)) < 0))
    > > - return;
    > Are you sure you want to remove this? I mean, sanity checks are a small
    > cost (I have several in the ftrace ring buffer) and can catch bugs in
    > case something happens during development. Especially when the code is
    > under a lot of flux.

    Yeah, I pondered adding a CONFIG_PERF_DEBUG for that.. thing is I was
    tracking 2 variables just for this, and that seemed a bit excessive.

    > I even have a sanity check that Ingo asked me to add, which would detect
    > if a tracer (not the ring buffer, but the user of the ring buffer)
    > recursed on itself. I think that check detected one bug in the function
    > tracer in the begging, but hasn't caught anything since.

    I still have recursion checks.

     \ /
      Last update: 2010-05-21 13:21    [W:0.020 / U:2.660 seconds]
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