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    SubjectRe: [PATCH 0/3] build system: section garbage collection for vmlinux
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    On Wed, 2007-09-05 at 21:31 +0200, Adrian Bunk wrote:
    > On Wed, Sep 05, 2007 at 08:14:12PM +0100, Denys Vlasenko wrote:
    > > On Wednesday 05 September 2007 19:38, Daniel Walker wrote:
    > > > > > You version doesn't work with CONFIG_MODULES right?
    > > > >
    > > > > It works with CONFIG_MODULES.
    > > >
    > > > Really? Take a look at this version,
    > > >
    > > > http://lkml.org/lkml/2006/6/4/169
    > > >
    > > > Marcello had to implement a two pass build to add back symbol used in
    > > > modules which got removed from the main kernel.. You don't appear to do
    > > > that. Marcelo also claims better size reduction than you.
    > >
    > > This will discard EXPORT_SYMBOLs potentially used by
    > > out-of-tree modules.
    > >
    > > I also saw ~10% size reductions, but then at run-time test modules
    > > failed to load, they didn't find needed symbols.
    > >
    > > OTOH if I know that I am not going to be using such modules,
    > > then this can be done. Will require another CONFIG_xxx, though.
    >
    > One point to keep in mind is that the space penalty of CONFIG_MODULES=y
    > is so big that CONFIG_MODULES=n is actually the most interesting case
    > for small systems that really need small kernels.

    Marcelo's version actual deals with the CONFIG_MODULES=y penalty , which
    is interesting to me .. It removes symbols added for CONFIG_MODULES
    which actually aren't used .. So CONFIG_MODULES=y is just as interesting
    as without (to me at least..).

    Daniel

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