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From: Thomas Gleixner <tglx@linutronix.de>
To: Mike Galbraith <efault@gmx.de>
Cc: Olof Johansson <olof@lixom.net>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	LKML <linux-kernel@vger.kernel.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	Ingo Molnar <mingo@kernel.org>, "H. Peter Anvin" <hpa@zytor.com>,
	Peter Zijlstra <peterz@infradead.org>
Subject: Re: [GIT pull] x86/timers for 4.10
Date: Thu, 9 Feb 2017 16:21:13 +0100 (CET)	[thread overview]
Message-ID: <alpine.DEB.2.20.1702091620270.3604@nanos> (raw)
In-Reply-To: <1486653397.3787.12.camel@gmx.de>

On Thu, 9 Feb 2017, Mike Galbraith wrote:

> On Thu, 2017-02-09 at 16:07 +0100, Thomas Gleixner wrote:
> > On Wed, 8 Feb 2017, Mike Galbraith wrote:
> > > On Wed, 2017-02-08 at 12:44 +0100, Thomas Gleixner wrote:
> > > > On Mon, 6 Feb 2017, Olof Johansson wrote:
> > > > > [    0.177102] [Firmware Bug]: TSC ADJUST differs: Reference CPU0:
> > > > > -6495898515190607 CPU1: -6495898517158354
> > > > 
> > > > Yay, another "clever" BIOS ....
> > > 
> > > Oh yeah, that reminds me...
> > > 
> > > I met one such box, and the adjustment code did salvage it, but I had
> > > to cheat a little for it to do so reliably, as it would sometimes still
> > > see a delta of 1 or 2 whole cycles, and hand me a useless wreck instead
> > > quick like bunny big box.
> > 
> > Can you share your cheatery ?
> 
> I didn't keep it, it was just a bandaid for a fleeting use, dirt simple
> ignore microscopic delta.

Can you send me the dmesg output of that box for a good and a bad case or
don't you have access to it anymore?

Thanks,

	tglx

  reply	other threads:[~2017-02-09 15:21 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-12-18 20:06 [GIT pull] x86/timers for 4.10 Thomas Gleixner
2017-02-07  1:31 ` Olof Johansson
2017-02-08 11:44   ` Thomas Gleixner
2017-02-08 13:04     ` Mike Galbraith
2017-02-09 15:07       ` Thomas Gleixner
2017-02-09 15:16         ` Mike Galbraith
2017-02-09 15:21           ` Thomas Gleixner [this message]
2017-02-09 15:25             ` Mike Galbraith
2017-02-09 15:39               ` Thomas Gleixner
2017-02-23  8:20         ` Mike Galbraith
2017-02-23  9:17           ` Peter Zijlstra
2017-02-23 10:26           ` Borislav Petkov
2017-02-23 13:29             ` Mike Galbraith

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