lkml.org 
[lkml]   [2006]   [Aug]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: [PATCH 0/4] Compile kernel with -fwhole-program --combine
    On Thu, Aug 24, 2006 at 04:24:28PM +0100, David Woodhouse wrote:
    >...
    > Using a combination of these two compiler options for building kernel
    > code leads to some useful optimisation -- especially with modules which
    > are made up of a bunch of incestuous C files, where none of the global
    > symbols actually _need_ to be visible outside the directory they reside
    > in. File systems are a prime example of this -- on PPC64 I see a
    > reduction in size of ext3.ko by 2.6%, jffs2.ko by 5%, cifs.ko by 8% and
    > befs.ko by a scary 14%. Strangely, udf.ko seems to have _grown_ by 6.6%
    > -- that'll probably be another optimisation bug like GCC PR28755.
    >...

    Looks good. :-)

    What kernel are your patches against?

    2.6.18-rc4 gives me:

    <-- snip -->

    ...
    CHK include/linux/version.h
    CHK include/linux/utsrelease.h
    CC arch/i386/kernel/asm-offsets.s
    GEN include/asm-i386/asm-offsets.h
    HOSTCC scripts/kallsyms
    HOSTCC scripts/conmakehash
    HOSTCC scripts/bin2c
    make[1]: *** No rule to make target `/home/bunk/linux/linux-2.6.18-rc4/dummy.c', needed by `init/init.o'. Stop.
    make: *** [init] Error 2

    <-- snip -->

    > dwmw2

    cu
    Adrian

    --

    Gentoo kernels are 42 times more popular than SUSE kernels among
    KLive users (a service by SUSE contractor Andrea Arcangeli that
    gathers data about kernels from many users worldwide).

    There are three kinds of lies: Lies, Damn Lies, and Statistics.
    Benjamin Disraeli

    -
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.kernel.org
    More majordomo info at http://vger.kernel.org/majordomo-info.html
    Please read the FAQ at http://www.tux.org/lkml/

    \
     
     \ /
      Last update: 2006-08-24 23:51    [W:0.024 / U:61.452 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site