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SubjectRe: [patch] Real-Time Preemption, -VP-2.6.9-rc4-mm1-U3
Ingo Molnar wrote:
> * K.R. Foley <> 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.

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