linux-kernel - Re: next-20130709 DMAR issues

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Date:	Fri, 12 Jul 2013 16:31:22 +0200
From:	Joerg Roedel <joro@...tes.org>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	Valdis Kletnieks <Valdis.Kletnieks@...edu>,
	"Li, Zhen-Hua" <zhen-hual@...com>,
	David Woodhouse <dwmw2@...radead.org>,
	linux-kernel@...r.kernel.org
Subject: Re: next-20130709 DMAR issues

Thanks for the heads-up, Ingo.

On Fri, Jul 12, 2013 at 02:14:20PM +0200, Ingo Molnar wrote:
> > Jul 10 12:20:19 turing-police kernel: [    0.021583] DMAR:[fault reason 06] PTE Read access is not set
> > 
> > Now I have 3 extra messages talking about handling a fault status.  lspci says 00:1f.2 is:
> > 
> > 00:1f.2 SATA controller: Intel Corporation 7 Series Chipset Family 6-port SATA Controller [AHCI mode] (rev 04)

This could be caused by some change in the SATA driver stack. Maybe a
DMA buffer is used after unmap or something.


> > If this doesn't ring any bells, I'l go do the bisect thing...

Yes, a bisection would help here, thanks for doing this.


	Joerg


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