On Mon, 2010-03-29 at 13:47 +0100, Stephane Eranian wrote:
quoted text
> On Mon, Mar 29, 2010 at 1:20 PM, Peter Zijlstra <a.p.zijlstra@chello.nl> wrote:
> > The LBRs are relatively cheap to keep enabled and provide some history
> > to OOPSen, also some CPUs are reported to keep them over soft-reset,
> > which allows us to use them to debug things like tripple faults.
> >
> > Therefore introduce a boot option: lbr_debug=on, which always enable
> > the LBRs and will print the LBRs on CPU init and die().
> >
> 
> When this is enabled, it will prevent changing the LBR configuration to
> record only selected branches. Unless you are willing to accept filtered
> content in the kernel dump. 

Sure, but since we don't support that silly config reg anyway that's
pretty much not an issue ;-)

--
unsubscribe notice
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/