Re: perf hw in kexeced kernel broken in tip

[Don Zickus]

On Wed, Dec 08, 2010 at 10:43:14AM -0800, Yinghai Lu wrote:
> 
> can you add sth force_... in command line to take over ownership of perf from BIOS or previous kernel ?
> 
> then still can use perf etc after we kexec from RHEL or SLES kernel to later kernel ( from 2.6.37)

My understand is that you can't because the BIOS is actively using it
behind the scenes of the kernel (well during an SMI).  I have a machine
where I tried to force take it but it still stopped triggering interrupts.

Cheers,
Don
--
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/