linux-kernel - RE: [RFC][Patch]efi_pstore:Introduce an efi_pstore_overwrite parameter to avoid missing messages in NVRAM

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Message-ID: <3908561D78D1C84285E8C5FCA982C28F1930CAE4@ORSMSX103.amr.corp.intel.com>
Date:	Wed, 13 Jun 2012 23:55:15 +0000
From:	"Luck, Tony" <tony.luck@...el.com>
To:	Seiji Aguchi <seiji.aguchi@....com>,
	Mike Waychison <mikew@...gle.com>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
	"Matthew Garrett (mjg@...hat.com)" <mjg@...hat.com>,
	"gong.chen@...ux.intel.com" <gong.chen@...ux.intel.com>,
	"keescook@...omium.org" <keescook@...omium.org>,
	"rob@...dley.net" <rob@...dley.net>,
	"dle-develop@...ts.sourceforge.net" 
	<dle-develop@...ts.sourceforge.net>,
	Satoru Moriya <satoru.moriya@....com>
Subject: RE: [RFC][Patch]efi_pstore:Introduce an efi_pstore_overwrite
 parameter to avoid missing messages in NVRAM

> I have one question. (It is not directly related to a discussion here.)
> Do you mean the limitation is due to EFI specification?
> Or do you mean there is no EFI server capable of a much amount of NVRAM? 

Maybe Matthew can answer that - I wouldn't think that the specification would
limit the amount of NVRAM - but I would expect implementations to do so. Generally
the EFI persistent space has to share the same flash chip as the BIOS ... and the
BIOS folks are good at filling up all the space with their own code & data. These
chips are still only a few (4, 8) Megabytes or so.

-Tony
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