linux-kernel - Re: [PATCH 1/5] Add functions producing system time given a backing counter value

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Message-ID: <20150729105104.GN19282@twins.programming.kicks-ass.net>
Date:	Wed, 29 Jul 2015 12:51:04 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Thomas Gleixner <tglx@...utronix.de>
Cc:	John Stultz <john.stultz@...aro.org>,
	Christopher Hall <christopher.s.hall@...el.com>,
	Richard Cochran <richardcochran@...il.com>,
	Ingo Molnar <mingo@...hat.com>,
	Jeff Kirsher <jeffrey.t.kirsher@...el.com>,
	john.ronciak@...el.com, "H. Peter Anvin" <hpa@...or.com>,
	"x86@...nel.org" <x86@...nel.org>,
	lkml <linux-kernel@...r.kernel.org>, netdev@...r.kernel.org
Subject: Re: [PATCH 1/5] Add functions producing system time given a backing
 counter value

On Wed, Jul 29, 2015 at 12:23:27PM +0200, Thomas Gleixner wrote:
> +/*
> + * CHECKME: Do we need the adjust value? It should be 0, but if we run
> + * in a VM this might be a different story.
> + */
> +static u64 tsc_adjust;

Urgh, VMs have !0 values here?
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