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    SubjectRe: [PATCH 00/05] Linux Kernel Markers - kernel 2.6.20
    * Andrew Morton (akpm@linux-foundation.org) wrote:
    > On 15 Feb 2007 10:28:57 -0500
    > fche@redhat.com (Frank Ch. Eigler) wrote:
    >
    > >
    > > akpm wrote:
    > >
    > > > [...] And what can I do with these markers? And once I've done it,
    > > > are there any userspace applications I can use to get the data out
    > > > in human-usable form? [...]
    > >
    > > The LTTng user-space programs use it today. Systemtap used to support
    > > the earlier marker prototype and will be rapidly ported over to this
    > > new API upon acceptance.
    > >
    >
    > That's good.
    >
    > It would be beneficial if some people from those projects could spare the
    > cycles to carefully review and runtime test this code.
    >
    LTTng is using the marker infrastructure since last november. Me and my
    users have been very happy with it.

    > Also, I'm not 100% clear on where we ended up with the huge
    > static-vs-dynamic flamewar. Did everyone end up happy? Is this patchset a
    > reasonable compromise? Or do we need a rematch?

    I think the final agreement was the need for some kind of code marking
    system, which I tried to implement as best as I could. It gives very
    good performances while tracing (advantage of static tracing), has a
    very very minimal performance and binary size impact when disabled
    (advantage of dynamic tracing) and it can be activated dynamically
    (advantage of dynamic tracing).

    Mathieu

    --
    Mathieu Desnoyers
    Computer Engineering Ph.D. Candidate, École Polytechnique de Montréal
    OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68
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