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    SubjectRe: [Devel] [PATCH] pidns: Place under CONFIG_EXPERIMENTAL (take 2)
    "Kir Kolyshkin" <> writes:

    > Eric,
    > Could you please hold off the horses a bit and wait till Pavel Emelyanov
    > returns? It means next Monday; he's currently at a conference whose organisers
    > don't provide internet access.

    When we decided to go top down (i.e. user interface first) instead of
    bottom up with the pid namespace implementation it was my
    understanding that we had agreed we would make the pid namespaces
    depend on CONFIG_EXPERIMENTAL so that we wouldn't be stuck forever
    supporting early ABI mistakes.

    So to my knowledge the conversation has already happened. I believe
    something in the confusion of trying to use these options to shrink
    the kernel and the futility of that, caused whatever config options
    we had before to be dropped.

    Further I was happy to let Pavel and Suka work on this code because
    the appeared to know what they were doing and it freed me to do other
    things. I don't think there are any mysteries in what we are trying
    to do that I need them to explain.

    > I feel it makes great sense to review/discuss patches first on containers@
    > first before submitting directly to lkml/Linus.

    My feel before starting to review the pid namespace patches was that
    the work was essentially done except a handful of minor details. Upon
    closer examination, I found that not to be the case. My rough fix
    queue had 25 or so patches as of last night to fix pid namespace

    I have no confidence that we will fix all of the pid namespaces issues
    before 2.6.24-final. I do think we can get most of them fixed.

    Given that most of the remaining issues are integration issues
    with the rest of the kernel having the code merged should make
    it much easier to see what is going on and actually fix things.
    So I am not in favor of reverting this code despite seeing numerous

    > Speaking of this particular patch -- I don't understand how you fix
    > "innumerable little bugs" by providing stubs instead of real functions.
    > Sent from my BlackBerry; please reply to

    It doesn't fix the bugs it avoids them because there is no way to
    get to the them and trigger them. So far I have yet to find a bug
    that is a problem with only a single pid namespace in the kernel.

    Since everyone agrees that there are at least some deficiencies in
    the current pid namespace I think this makes sense, to mark
    the code as EXPERIMENTAL and have a way for people who care to
    shut it off just so they don't have to worry about new issues.

    As far as how the config option is implemented I don't much care
    so long as I get the -EINVAL when I pass CLONE_NEWPID as root.

    Essentially this patch is part of a defense in depth against pid
    namespace problems hitting people. This patch is my first line
    of defense. Actually fixing all of the rest of the known bugs
    is the other line.

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      Last update: 2007-10-27 00:03    [W:0.023 / U:21.728 seconds]
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