linux-kernel - Re: [PATCH -v2 3/7] x86, NMI, Rename memory parity error to PCI SERR error

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Message-ID: <1285637617.20791.146.camel@yhuang-dev>
Date:	Tue, 28 Sep 2010 09:33:37 +0800
From:	Huang Ying <ying.huang@...el.com>
To:	Robert Richter <robert.richter@....com>
Cc:	Don Zickus <dzickus@...hat.com>, Ingo Molnar <mingo@...e.hu>,
	"H. Peter Anvin" <hpa@...or.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Andi Kleen <andi@...stfloor.org>
Subject: Re: [PATCH -v2 3/7] x86, NMI, Rename memory parity error to PCI
 SERR error

On Tue, 2010-09-28 at 00:45 +0800, Robert Richter wrote:
> > > > Ok. I will add CPU ID in message. Because we know the reason, I don't
> > > > think we need the reason in message.
> > > 
> > > You only know that bit 7 is set, not the rest. As this is an error
> > > message we should provide as much information as possible.
> > 
> > Well, what other info do we know besides that bit being set?  (I wish we
> > had more, but I don't think we do)
> 
> We should keep printing the reason byte as it did before.

The reason is printed before because mem_parity_error is treated as
something like unknown reason. And iochk_error is treated as known
reason and will not print the reason byte. Please the check the original
code.

But now we treat pci_serr_error (renamed from mem_parity_error) as known
reason. So it is not necessary to print the reason byte. I suggest to
print the reason byte only if (!(reason & 0xc0) && reason), where the
reason is really unknown.

Best Regards,
Huang Ying


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