Messages in this thread | | | Date | Wed, 13 Dec 2006 14:45:19 -0800 | From | "H. Peter Anvin" <> | Subject | Re: [RFC] new MSR r/w functions per CPU |
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Dave Jones wrote: > > Can you explain this a little further? I'm fairly certain > there are places in the kernel already doing this (or similar). > In fact, I cut-n-pasted most of the above from similar code in the > powernow-k8 driver. What exactly can we deadlock on? >
I wanted to change the MSR driver to do the above, and Alan Cox objected that with realtime priority routines and/or user set affinity, that code might never be executed, so I retained the IPI-based code (which executes at the target processor at interrupt priority.)
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