Messages in this thread |  | | | Date | Wed, 8 Dec 2010 14:01:58 -0500 | | From | Don Zickus <> | | Subject | Re: perf hw in kexeced kernel broken in tip |
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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
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