linux-kernel - Re: [PATCH 03/20] x86, mce: Add persistent MCE event

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Date:	Thu, 11 Nov 2010 16:38:50 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Borislav Petkov <bp@...64.org>
Cc:	Ingo Molnar <mingo@...e.hu>, Ben Gamari <bgamari@...il.com>,
	"acme@...radead.org" <acme@...radead.org>,
	"fweisbec@...il.com" <fweisbec@...il.com>,
	"rostedt@...dmis.org" <rostedt@...dmis.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 03/20] x86, mce: Add persistent MCE event

On Thu, 2010-11-11 at 14:34 +0100, Borislav Petkov wrote:
> 3) enable the persistent event and stash its fd in some /sysfs member
> which the RAS daemon reads out and mmaps. This last one actually sounds
> pretty neat. 

Right, stashing the thing in sysfs, which you can open()+mmap() seems
the best way. Not sure you want to make it a RAS specific place, maybe a
generic persistent buffer place.

You'll get multiple files anyway, one per cpu, so maybe something like:

/sysfs/persistent_buffer/ras[0..n]


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