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    SubjectRe: module mess in -CURRENT
    Date
    In message <1037240840.14393.4.camel@irongate.swansea.linux.org.uk> you write:
    > On Thu, 2002-11-14 at 00:59, Linus Torvalds wrote:
    > > People who find the current module situation difficult can just compile in
    > > the stuff they need for now.
    >
    > That makes driver debugging almost impossible. It also makes building a
    > test kernel set for a lot of boxes impractical.

    Sorry, I know I've been feeding Linus too slowly, but I've just flown
    into Spain and I have a tutorial to deliver. I'm solving it my not
    sleeping, but that doesn't scale.

    > The completely broken unload stuff is going to be a real pig, PCMCIA
    > only works modular and doesn't work now the unloads are all broken.

    Agreed, that's what "rmmod --force" is for. Patch in the queue, I
    promise. That gives more breathing room for fixing the "marked
    unsafe" issue.

    > OTOH the module rewrite has some nice features and a combo modutils
    > is going to sort some of the problem out fairly easily.

    Patches welcome, of course. I didn't do any work on the modutils once
    they passed "backwards compat exec works, basic features work".

    Trying to test both the entire stack of patches, and just the first
    three I was sending to Linus, as every tree came out: well, you can
    tell my testing wasn't thorough enough for .47.

    > The biggest need though is documentation so people can actually fix all
    > the drivers for this stuff.

    I posted a document previously (again) and it recieved (valid) harsh
    criticism for being opaque. I'll rework it. Basically, its an
    expansion of the old try_inc_modcount to be a first-class citizen
    (hence called try_module_get()). As previously, should be called
    (successfully!) before calling through a function ptr which might be
    in a module (ie. most code which exposes a "register_xxx" should use
    it). Exceptions if that function cannot sleep (and can't be
    preemped).

    Why is PCMCIA broken?
    Rusty.
    --
    Anyone who quotes me in their sig is an idiot. -- Rusty Russell.
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