linux-kernel - Re: [PATCH 0/6] Add a per-dimm structure

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Date:	Wed, 14 Mar 2012 23:31:02 +0100
From:	Borislav Petkov <bp@...64.org>
To:	Greg KH <gregkh@...uxfoundation.org>
Cc:	Mauro Carvalho Chehab <mchehab@...hat.com>,
	Linux Edac Mailing List <linux-edac@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 0/6] Add a per-dimm structure

On Wed, Mar 14, 2012 at 01:43:55PM -0700, Greg KH wrote:
> > He thinks that a multi-layer struct should be created inside that directory
> > (it could have 2 or 3 levels of directories, depending on how the memory is
> > organized at the memory controller), instead of having a large number of files
> > there.
> 
> Why create subdirs?  If those subdirectories are not real devices,
> showing a real hierarchy, then do not create them as userspace will get
> very confused very quickly.

Why, IMO, we agreed on the following layout

rank0/
|-- dimm_dev_type
|-- dimm_edac_mode
|-- dimm_label
|-- dimm_location
|-- dimm_mem_type
|-- CE
|-- UE
`-- dimm_size

with CE being the correctable errors counter and UE be optional and only
present when it makes sense for the hardware.

This is not multi-layered, it is very easy to implement and mirrors all
possible memory controllers from the point of view of the single DIMM.
no? Or am I missing something...?

Thanks.

-- 
Regards/Gruss,
Boris.

Advanced Micro Devices GmbH
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