Fatal trap 30: reserved (unknown) fault

[Bruce Cran]

Alexander Motin wrote:
> About month ago after one of my amd64 8-CURRENT upgrade I have started 
> to see crashes with very strange message:
> Fatal trap 30: reserved (unknown) fault while in kernel mode
>
> Crash usually happens during some driver loading or unloading, for 
> example, snd_hda, which always worked fine before, or during ata 
> channel detach/attach which also causes device destruction/creation. 
> Backtrace of this state shows nothing interesting, for example idling 
> in acpi_cpu_c1() or just DELAY().
>
> Does anybody knows, for whom is this fault "reserved" and what does it 
> mean?
>

There was a recent thread about this - see also "r187880 causes fatal 
trap 30 when unloading drivers"

-- 
Bruce Cran