lkml.org 
[lkml]   [2002]   [Mar]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    From
    SubjectRe: [Lse-tech] Re: 10.31 second kernel compile
    Date
    On Wed, 13 Mar 2002 13:44:43 -0800, 
    Dave Hansen <haveblue@us.ibm.com> wrote:
    >The final linking stage in the makefile looks like this:
    >
    >vmlinux: piggy.o $(OBJECTS)
    > $(LD) $(ZLINKFLAGS) -o vmlinux $(OBJECTS) piggy.o
    >
    >If we link in chunks, we can parallelize this.
    >Image 26 object files: [a-z].o
    >
    >ld -r -o abcd.o [abcd].o
    >ld -r -o efgh.o [efgh].o
    >...
    >ld -r -o abcdefgh.o {abcd,efgh,...}.o
    >
    >then, instead of the old final link stage:
    >$(LD) $(ZLINKFLAGS) -o vmlinux {abcdefgh,...}.o piggy.o
    >
    >The final link will still take a while, but we will have at least broken
    >up SOME of the work. I'm going to see if this will actually work now.
    >Any comments?

    I'm sorry Dave, you can't do that ;) The init_call order is controlled
    by link order, change the link order and you corrupt the kernel
    initialization order, double plus ungood. The link of vmlinux requires
    that $(OBJECTS) be exactly as coded.

    -
    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: 2005-03-22 13:25    [W:0.022 / U:60.292 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site