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    SubjectRe: [2.6.18-rc7-mm1] slow boot
    Am 28.09.2006 19:12 schrieb Andi Kleen:
    > On Thursday 28 September 2006 19:00, Tilman Schmidt wrote:
    >
    > missing context here, but ...

    Forwarded by separate mail.

    >> x86_64-mm-i386-stacktrace-unwinder.patch
    [...]
    >> 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.

    Indeed.

    > 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.

    Unfortunately, it is. Boot time roughly doubles from 39 to 76 secs.

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

    I'm afraid I'll need instructions for that. I assume "profile=1"
    is to be appended to the kernel command line; but how do I
    retrieve that readprofile output you are asking for?

    Thanks
    Tilman

    --
    Tilman Schmidt E-Mail: tilman@imap.cc
    Bonn, Germany
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