linux-kernel - RE: [RFC][PATCH]ACPI,APEI,ERST, back end driver for NVRAM

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Message-ID: <5C4C569E8A4B9B42A84A977CF070A35B2C57F7ADB5@USINDEVS01.corp.hds.com>
Date:	Thu, 15 Dec 2011 11:03:08 -0500
From:	Seiji Aguchi <seiji.aguchi@....com>
To:	Huang Ying <ying.huang@...el.com>
CC:	"linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"lenb@...nel.org" <lenb@...nel.org>,
	"Luck, Tony" <tony.luck@...el.com>,
	"Chen, Gong" <gong.chen@...el.com>,
	Matthew Garrett <mjg@...hat.com>,
	"dle-develop@...ts.sourceforge.net" 
	<dle-develop@...ts.sourceforge.net>,
	Satoru Moriya <satoru.moriya@....com>
Subject: RE: [RFC][PATCH]ACPI,APEI,ERST, back end driver for NVRAM

Hi,

>
>No.  I have different understanding.
>
>Because error log address range resides in NVRAM, the contents will be
>reserved even after reboot.  So we do not need read/clear operations at
>all, and should place all records in error log address range.

I have a quick question about your comment above.
Do you know whether this optimization of read/clear operations works 
on machines which APEI is enabled by WHEA _OSC call?

Seiji