Re: Buggy IPI and MTRR code on low memory

[Arjan van de Ven]

On Wed, 28 Jan 2009 12:24:48 -0500 (EST)
Steven Rostedt <rostedt@xxxxxxxxxxx> wrote:


> > ---
> I'll have skip the NMI test and see if it locks up any place else.

if you get an NMI during MTRR changing you are more or less screwed.
Really. (the cpu is uncachable etc)

the MTRR code should disable NMIs as much as possible.

and for sure in -RT, the MTRR change section should not be preemptable
at all.

-- 
Arjan van de Ven 	Intel Open Source Technology Centre
For development, discussion and tips for power savings, 
visit http://www.lesswatts.org
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/