linux-kernel - Re: [KVM timekeeping 08/35] Warn about unstable TSC

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Message-ID: <20100820172824.GD2937@mothafucka.localdomain>
Date:	Fri, 20 Aug 2010 14:28:24 -0300
From:	Glauber Costa <glommer@...hat.com>
To:	Zachary Amsden <zamsden@...hat.com>
Cc:	kvm@...r.kernel.org, Avi Kivity <avi@...hat.com>,
	Marcelo Tosatti <mtosatti@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	John Stultz <johnstul@...ibm.com>, linux-kernel@...r.kernel.org
Subject: Re: [KVM timekeeping 08/35] Warn about unstable TSC

On Thu, Aug 19, 2010 at 10:07:22PM -1000, Zachary Amsden wrote:
> If creating an SMP guest with unstable host TSC, issue a warning
> 
> Signed-off-by: Zachary Amsden <zamsden@...hat.com>
Ok, I am not sure I agree 100 % this is needed.
I believe we should try to communicate this kind of thing to the guest,
not the host, and through cpuid.

Passing through tsc flags to the guest should maybe be enough?
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