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    SubjectRe: [RFC PATCH 1/2] x86: Fix rbp saving in pt_regs on irq entry
    On Fri, Jan 07, 2011 at 04:13:58PM +0000, Jan Beulich wrote:
    > >>> On 07.01.11 at 17:05, Frederic Weisbecker <fweisbec@gmail.com> wrote:
    > > Once I'll have perf callchain based on CFI ready, we'll perhaps find some
    > > issues
    > > there. Although I guess there are already tools that can make use of that.
    >
    > Is this to read that you're planning to do a re-spin of the CFI
    > unwinding code (which I'm not allowed to submit another time,
    > but which we've been using for years in SuSE distros) then?

    An in-kernel CFI unwinder?

    No the intended CFI unwinding that I'm working on for perf is made
    on post-processing, on top of partial stack and regs snapshots.

    The true unwinding is computed in userspace.


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