Re: [BUG] Softlockup detected with linux-2.6.14-rt6

K.R. Foley
2005-11-18T18:34:19Z

Luca Falavigna wrote:
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> Luca Falavigna ha scritto:
> | Actually I am testing linux-2.6.14-rt13. If this problem come out again,
> | I will notify you ASAP.
>
> Unfortunately this soft lockup bug affects version 2.6.14-rt13 too :(
> Stack traces are almost the same, except base addresses.
>
> The bug was much harder to track down this time. Kernel detected a soft
> lockup bug after about three days of uptime.
>
> I noticed another strange behaviour. When I rebooted the machine
> (actually pushing reset button, not CTRL+ALT+CANC or SysRq at all), it
> became *very* slow. GRUB took up to five seconds to be fully loaded
> (usualy it takes only a fraction of second) and the initial phase of
> booting the kernel was about 4 times slower. Even after a power off this
> behaviour was still present! Need more coffee?

The slow booting sounds a lot like the RCU_TORTURE_TEST slowing things
down. You might try turning off RCU_TORTURE_TEST or setting it to be a
module.

>
> Regards,
> - --
> Luca
>
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--
kr