Re: [patch] Real-Time Preemption, -RT-2.6.12-rc6-V0.7.48-00

["K.R. Foley" <kr@cybsft.com>]

K.R. Foley wrote:
> Ingo Molnar wrote:
> 
>> i have released the -V0.7.48-00 Real-Time Preemption patch, which can 
>> be downloaded from the usual place:
>>
>>     http://redhat.com/~mingo/realtime-preempt/
>>
>> this release includes an improved version of Daniel Walker's soft 
>> irq-flag (hardirq-disable removal) feature. It is an unconditional part
>> of the PREEMPT_RT preemption model - other preemption models should not
>> be affected that much (besides possible build issues). Non-x86 arches
>> wont build. Some regressions might happen, so take care..
>>
>> Changes since -47-29:
>>
>>  - soft IRQ flag support (Daniel Walker)
>>
>>  - fix race in usbnet.c (Eugeny S. Mints)
>>
>>  - further improvements to the soft IRQ flag code
>>
>> to build a -V0.7.48-00 tree, the following patches should to be applied:
>>
>>    http://kernel.org/pub/linux/kernel/v2.6/linux-2.6.11.tar.bz2
>>    http://kernel.org/pub/linux/kernel/v2.6/testing/patch-2.6.12-rc6.bz2
>>    
>> http://redhat.com/~mingo/realtime-preempt/realtime-preempt-2.6.12-rc6-V0.7.48-00 
>>
>>
>>     Ingo
> 
> 
> Ingo,
> 
> I can't get any version of RT-preempt applied to 2.6.12-rc6 up to and 
> including 48-01 to boot on any of my SMP systems. I get no log because 
> it dies right after the "Uncompressing kernel" message. 2.6.12-rc6 boots 
> fine.  I am attaching my config. Am I missing something obvious? I am 
> building 48-01 with voluntary-preempt now to try that.
> 
> 

Well crap. Perhaps I should have tried this first. If I disable the 
runtime selectable locking

# CONFIG_DEBUG_RT_LOCKING_MODE is not set

it seems to work fine. With the above enabled it hangs on both of my SMP 
systems as described above. :-/

-- 
    kr