Re: [PATCH v4 2/5] x86/msr: Carry on after a non-"safe" MSR access fails without !panic_on_oops

[Peter Zijlstra]

On Mon, Mar 14, 2016 at 11:10:16AM -0700, Andy Lutomirski wrote:
> A couple of the wrmsr users actually care about performance.  These
> are the ones involved in context switching and, to a lesser extent, in
> switching in and out of guest mode.

Right, this very much includes a number of perf MSRs. Some of those get
called from the context switch path, others from the NMI handler.