[LAT] 2.6.29-rt1

Robin Gareus robin at gareus.org
Thu Mar 26 17:20:48 EDT 2009

Hash: SHA1

Fernando Lopez-Lezcano wrote:
> On Thu, 2009-03-26 at 19:52 +0100, Robin Gareus wrote:
> We've got a winner! 2.6.29-rt1
>> Hmmmm, getting close but not yet a winner :-) 
>> I've been tracking the 2.6.29 rcx series and I'm still having some
>> problems. 2.6.29-rt1 still does not shutdown correctly with my kernel
>> configuration options (you need to specify "noreplace-smp" in the kernel
>> startup line for shutdown to happen - otherwise you get a problem at the
>> very end of the halt and the machine does not power down). 

This is related to your BIOS or motherboard. Do you have the same
problem with a vanilla 2.6.29?

Since I only did reboots, I just performed a shutdown to check and it
powers off just fine. I don't use any boot options (only "root=xx quiet
ro") on this dual-core intel.
Why shut-down, anyway? s2ram and s2disk work fine with 2.6.29-rt1. I'm
very very happy (-:

>> And I have seen it hung (hard) the whole machine where a normal kernel
>> would just work. I'm still trying to find a way to debug that. 

I did not have those for a long time (~2years), previously I experienced
hard lockups when using wifi (iwl3945) and rtirq.

I dare say there's no way to debug that - but you should ask that on
rt-linux list. There's ways to tweak things in /proc/sys/kernel/sched_*
if this lock-up is caused by a runaway process.

It could also be CPU overheating, but then the problem should also occur
with non realtime kernels as well.

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