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: <5C4C569E8A4B9B42A84A977CF070A35B2E5A4DB456@USINDEVS01.corp.hds.com>
Date:	Wed, 13 Jun 2012 19:28:03 -0400
From:	Seiji Aguchi <seiji.aguchi@....com>
To:	"Luck, Tony" <tony.luck@...el.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 think not - the limitation is EFI (ERST can handle several errors, I think that the ramoops patches are working with the assumption that
> enough storage is available too).
> 

I see.

> The question is how easy is it for EFI to determine the "type" of the saved error (which may be from the previous booted kernel - so
> no use using a global variable ... the information needs to be in persistent store).

OK. I will not use the global variable.
I can check the previous event from a header supplied by pstore ,such as "Panic#1 Part1".

Seiji
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