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    SubjectRe: [2.6.18-rc7-mm1] slow boot
    On Thursday 28 September 2006 19:00, Tilman Schmidt wrote:

    missing context here, but ...

    > On 24.09.2006 23:53, Andrew Morton wrote:
    > > Do you have the time to go through the
    > >
    > > process?
    > Phew, it's done. And the winner is:
    > x86_64-mm-i386-stacktrace-unwinder.patch
    > --------8<--------8<--------8<--------8<--------8<--------8<--------
    > i386: Do stacktracer conversion too
    > Following x86-64 patches. Reuses code from them in fact.
    > Convert the standard backtracer to do all output using
    > callbacks. Use the x86-64 stack tracer implementation
    > that uses these callbacks to implement the stacktrace interface.
    > This allows to use the new dwarf2 unwinder for stacktrace
    > and get better backtraces.
    > Cc:
    > Signed-off-by: Andi Kleen <>
    > -------->8-------->8-------->8-------->8-------->8-------->8--------
    > Backing out just this patch from 2.6.18-mm1 (and resolving conflicts
    > manually the obvious way) gets the boot time back to normal (ie. as
    > fast as 2.6.18 mainline) on my
    > Linux gx110 2.6.18-mm1-noinitrd #2 PREEMPT Thu Sep 28 18:48:32 CEST 2006 i686 i686 i386 GNU/Linux
    > machine.

    Hmm, i assume you have lockdep on. The new backtracer is of course slower
    than the old one and it will slow down lockdep which takes a lot of backtraces.
    But it shouldn't be a significant slowdown.

    Can you perhaps boot with profile=1 and then send readprofile output after

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      Last update: 2006-09-28 19:15    [W:0.020 / U:8.408 seconds]
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