Re: [PATCH v2] x86/paravirt: Don't make vcpu_is_preempted() a callee-save function

From: Peter Zijlstra
Date: Tue Feb 14 2017 - 04:41:14 EST

On Mon, Feb 13, 2017 at 05:34:01PM -0500, Waiman Long wrote:
> It is the address of &steal_time that will exceed the 32-bit limit.

That seems extremely unlikely. That would mean we have more than 4G
worth of per-cpu variables declared in the kernel.