linux-kernel - Re: [PATCH] x86, MCE, fix MSR_IA32_MCI

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Date:	Tue, 18 May 2010 08:51:45 +0800
From:	Huang Ying <ying.huang@...el.com>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Ingo Molnar <mingo@...e.hu>, Andi Kleen <ak@...ux.intel.com>,
	Hidetoshi Seto <seto.hidetoshi@...fujitsu.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] x86, MCE, fix MSR_IA32_MCI_CTL2 CMCI threshold setup

Hi, Peter,

Thanks for review.

On Tue, 2010-05-18 at 01:59 +0800, H. Peter Anvin wrote:
> On 05/17/2010 01:08 AM, Huang Ying wrote:
> > It is reported that CMCI is not raised when number of corrected error
> > reaches preset threshold. After inspection, it is found that
> > MSR_IA32_MCI_CTL2 threshold field is not setup properly. This patch
> > fixed it.
> > 
> > 
> > Changelog:
> > 
> > v2:
> > 
> > - Rename CMCI_EN to MCI_CTL2_CMCI_EN and CMCI_THRESHOLD_MASK to
> >   MCI_CTL2_CMCI_THRESHOLD_MASK to make naming consistent.
> > 
> 
> This looks like a mix of a renaming patch and new functionality.  Please
> submit the renaming as a one patch and then the new functionality as a
> second patch on top, otherwise it gets hard to see what is actually
> going on.
> 
> If I'm not mistaken, there are at least two functionality changes:
> 
> +#define MCI_CTL2_CMCI_THRESHOLD_MASK	0x7fffULL
> -#define CMCI_THRESHOLD_MASK		0xffffULL
> 
> ... change of mask, and:
> 
> -		val |= CMCI_EN | CMCI_THRESHOLD;
> +		val &= ~MCI_CTL2_CMCI_THRESHOLD_MASK;
> +		val |= MCI_CTL2_CMCI_EN | CMCI_THRESHOLD;
> 
> bit being cleared which wasn't before.

This means we need 3 patches?

Best Regards,
Huang Ying


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