linux-kernel - Re: [PATCH v2 1/2] mce: acpi/apei: Honour Firmware First for MCA banks listed in APEI HEST CMC

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Date:	Thu, 20 Jun 2013 21:29:28 +0200
From:	Borislav Petkov <bp@...en8.de>
To:	"Naveen N. Rao" <naveen.n.rao@...ux.vnet.ibm.com>
Cc:	tony.luck@...el.com, ananth@...ibm.com, masbock@...ux.vnet.ibm.com,
	lcm@...ux.vnet.ibm.com, linux-kernel@...r.kernel.org,
	linux-acpi@...r.kernel.org, ying.huang@...el.com
Subject: Re: [PATCH v2 1/2] mce: acpi/apei: Honour Firmware First for MCA
 banks listed in APEI HEST CMC

On Fri, Jun 21, 2013 at 12:38:13AM +0530, Naveen N. Rao wrote:
> We need this bitfield to prevent enabling CMCI in future
> cmci_discover() invocations. See usage in cmci_discover() further
> below.

So?!

	/* Skip banks in firmware first mode */
	if (!test_bit(i, __get_cpu_var(mce_poll_banks))
		continue;

...

> >Yeah, let's call it ...disable_poll_bank because we're disabling polling
> >for those banks. And yes, we poll for errors for which no MCE exception
> >is generated and those happen to be corrected but still...
> 
> We actually also disable CMCI here. So, in essence, we are disabling
> these banks for all sorts of direct corrected error reporting. I
> thought of naming this disable_ce_on_bank() or disable_ce_bank(),
> but felt that the mce_ prefix would be good to have. If that isn't
> necessary, I can rename this to disable_ce_on_bank() which sounds
> more accurate to me. Is that ok?

No, mce_disable_bank() removes the respective bank from the polling
bitfield and cmci_disable_bank() actually disables CMCI which is
Intel-only. So leave it at mce_disable_bank and that should be fine.

Thanks.

-- 
Regards/Gruss,
    Boris.

Sent from a fat crate under my desk. Formatting is fine.
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