On 19.06.2013 07:20, Linus Torvalds wrote:

quoted

No crash in 2 days running with preempt none...

Is this UP?

Yes it is.

There's the fast_tlb race that Peter fixed in commit 29eb77825cc7
("arch, mm: Remove tlb_fast_mode()"). I'm not seeing how it would
cause infinite TLB faults, but it definitely causes potentially
incoherent TLB contents. And afaik it only happens with
CONFIG_PREEMPT, and on UP systems. Which sounds like it might match
your setup...

Oh, thank you for the pointer, this indeed looks interesting.

Unfortunately the patch massively does not apply to 3.4 which
I am using and I know too little what all is involved here
to backport it. I will test it when (if) it gets to the 3.4(-rt)
(or when I find some spare time to play with the newer kernel
on that system).

Thanks
-- 
                                     Stano