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    SubjectRe: [patch] Real-Time Preemption, -VP-2.6.9-rc4-mm1-U3
    Ingo Molnar wrote:
    > * K.R. Foley <kr@cybsft.com> wrote:
    >
    >
    >>>>It builds fine if CONFIG_SMP is set. Am I really the only person
    >>>>running this on UP?
    >>>
    >>>I run both, on different machines.
    >>>
    >>>I'm actually running 2.6.9-rc4-mm1-U3 at this very moment, on my laptop
    >>>(P4 2.53Ghz/UP, Mdk 10.1c) and also on my desktop machine (P4
    >>>2.80Ghz/SMP/HT, SuSE 9.1).
    >>>
    >>>However, on the desktop (SMP/HT) I could only made it boot/init
    >>>successfully with CONFIG_PREEMPT_REALTIME off. On my laptop (UP) is
    >>>running pretty well on full RT.
    >>
    >>I'm curious what you get when you try to boot the SMP system with
    >>REALTIME on? My SMP/HT system at the office works fine with this.
    >>Although there is one difference that jumps out at me. I have disabled
    >>ACPI. I don't have the config handy so I can't do a complete
    >>comparison, just going from memory.
    >
    >
    > one group of complaints seems to be related to SELINUX=y: it has hooks
    > all across the kernel deep within the locking hierarchy - and then
    > itself it does pretty complex stuff too. IPC is certainly broken due to
    > this, but some networking problems seem to be related too.
    >
    > Ingo
    >
    Well therein lies a big difference. I have disabled this on all the
    systems that I am testing on.

    kr
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