Hey Kimmo,

quoted

you can get the patch here; http://pastebin.com/VG7X5WjK ... it
applies over 3.14.3-rt5 [after you've already applied the -rt patch,
you apply it]. It's yielded working AMD Phenom systems for me
[although, i don't have the exact same H/W as you]. it might be worth
a try, just to see if it works.

I can confirm that applying the patch in http://pastebin.com/VG7X5WjK to
3.14.3-rt5 makes my system bootable even with AMD C1E enabled.
To clarify my previous email, those other tricks "processor.max_cstate=0",
"processor.nocst", etc... did not help.

Well, it looks like you are another person who's system is unstable
when those 3 upstream -rt patches are applied. Reverting [as you have
done now] should result in a usable/stable system for you [its worked
for myself and others for a few releases now. Maybe you can post back
on how that goes for you?]. Although, depending on config; ie: if you
are using no_hz_idle/full you may see "NOHZ: softirq pending 40"
[which one of the patches we reverted fixes, IIRC]. Myself, I don't
use NO_HZ_* and use the 'periodic timers' in the kernel, instead.

anyway, I am not sure how to fix this, beyond reverting / using that
patch. I know that some of the devs have had a hard time reproducing
the problem - maybe Paul will have better luck on another AMD system
[here is hoping]. But at least for now, you should be able to use that
patch.

jordan

Kimmo

quoted

quoted

OK, so I never got back to finding a system that could reproduce this,
but it sounds like it is still worthwhile; thanks for the reminder and
I'll go see if I can reproduce this on a quad since the six core was OK.

Hey Paul, I also forgot to get back to you ;) ... I had been carrying
over my .config - so i tried using defconfig too [just to see] and it
was no different. I was astonished that yours booted up just fine,
because i know of other AMD users [aside from Kimmo] who can't boot on
vainlla-rt... Again, 3.14.x-rtX boot and work just fine for me, by
reverting those patches. I had thought maybe -rt5 would boot [it
looked to have some substantial changes], but alas -rt5 also required
the patch for a working system.

Jordan

quoted

P.
--

quoted

Cheers
Kimmo

quoted

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