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    SubjectRe: [PATCH] x86: add the debugfs interface for the sysprof tool
    On Sun, Feb 24, 2008 at 08:10:02AM -0500, Theodore Tso wrote:

    > > Firstly, the distributions should have set this up automatically. That
    > > they don't is a distributor bug. The sheer madness of Linux not leaving
    > > a vmlinux file in a stable known location is hardly something oprofile
    > > can be blamed for.
    > Wrong Answer. People who write userspace helpers *have* to do the
    > work of the distro's. It's a bad, bad, bad, Bad, BAD idea to leave it
    > up to the distributions. It means that some distributions won't get
    > it right; other distributions will do it in different ways, making it
    > harder for users to switch between distro's and making it harder for
    > people to write distribution-neutral HOWTO's.

    Hi Ted. I would have loved to have fixed it myself, or had one of the
    other oprofile contributors do so. Unfortunately I have no control over
    what the distributions do. For example:

    > There are plenty of things that can be done, including using search
    > paths to try to find vmlinuz; or maybe even proposing a new standard
    > such as say for example /lib/modules/`uname -r`/vmlinux being a

    At the time when I was trying to fix this, I wasn't aware of any way to
    propose a new standard and get distributions to follow it - is there
    some way now? Informally I discussed this problem several times with
    many people without any resolution. As regards searching informal paths,
    this is extremely risky - get the wrong vmlinux and we end up with
    inaccurate results, which is worse than no results.

    > The abdication of responsibility and the lack of trying to solve the
    > usability issues is one of the things that really worries me about
    > *all* of Linux's RAS tools. We can and should do better! And it's
    > really embarassing that the RAS maintainers seem (I assume you are one
    > of the oprofile maintainers), seem to be blaming this on the victims,
    > the people who are complaining about using *your* tool. Yes, it's a

    I'm not abdicating responsibility: I no longer maintain oprofile,
    haven't for a long time, and the other contributors don't have any real
    time to spend on it either. I'm well aware there are improvements to be
    made: when I (and others) had time, this stuff was improving massively
    with each release. When Soren et al had a need for a simple tool + GUI,
    they should have helped out with this: it's simply good engineering to
    not duplicate efforts. I didn't even get a /single/ email.


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