linux-kernel - Re: [PATCH v3] x86/mce: Honour bios-set CMCI threshold

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Message-ID: <20121017164006.GA14596@x1.osrc.amd.com>
Date:	Wed, 17 Oct 2012 18:40:06 +0200
From:	Borislav Petkov <bp@...en8.de>
To:	"Naveen N. Rao" <naveen.n.rao@...ux.vnet.ibm.com>
Cc:	tony.luck@...el.com, gong.chen@...ux.intel.com, ananth@...ibm.com,
	masbock@...ux.vnet.ibm.com, x86@...nel.org,
	linux-kernel@...r.kernel.org, bp@...64.org, lcm@...ibm.com,
	andi@...stfloor.org, hpa@...or.com, tglx@...utronix.de,
	mingo@...hat.com, gregkh@...e.de, linux-edac@...r.kernel.org
Subject: Re: [PATCH v3] x86/mce: Honour bios-set CMCI threshold

On Wed, Oct 17, 2012 at 09:17:39PM +0530, Naveen N. Rao wrote:
> Userspace tools need this sysfs attribute so they know how to react on
> receipt of a corrected error event: whether this is the first event or
> if such events have already been threshold-ed.

What's wrong with userspace tools parsing /proc/cmdline and seeing that
mce_bios_cmci_threshold has been set since this is the only way to set
it anyway?

I still don't see any reason for that read-only sysfs attribute.

Thanks.

-- 
Regards/Gruss,
Boris.
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