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Date:	Thu, 20 Mar 2014 15:29:28 -0700
From:	"H. Peter Anvin" <>
To:	Paolo Bonzini <>,
	Waiman Long <>,
	Thomas Gleixner <>,
	Ingo Molnar <>, Arnd Bergmann <>,
	Peter Zijlstra <>
CC:	Jeremy Fitzhardinge <>,
	Raghavendra K T <>,,,
	Andi Kleen <>,
	Michel Lespinasse <>,
	Alok Kataria <>,,
	Gleb Natapov <>,,,
	"Paul E. McKenney" <>,
	Scott J Norton <>,
	Rusty Russell <>,
	Steven Rostedt <>,
	Chris Wright <>,
	Oleg Nesterov <>,
	Boris Ostrovsky <>,
	Aswin Chandramouleeswaran <>,
	Chegu Vinod <>,,
	David Vrabel <>,
	Andrew Morton <>
Subject: Re: [PATCH v7 06/11] pvqspinlock, x86: Allow unfair queue spinlock
 in a KVM guest

On 03/20/2014 03:01 PM, Paolo Bonzini wrote:
> No!  Please do what I asked you to do.  You are not handling Hyper-V or
> VMWare.  Just use X86_FEATURE_HYPERVISOR and it will cover all
> hypervisors that actually follow Intel's guidelines.

And for those that don't, we should turn on X86_FEATURE_HYPERVISOR in
the Linux enumeration code as we do for other features we detect


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