linux-kernel - Re: [RFC][PATCH v2 2/3] Hold multiple logs

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Message-ID: <20120724210725.GA29109@srcf.ucam.org>
Date:	Tue, 24 Jul 2012 22:07:25 +0100
From:	Matthew Garrett <mjg@...hat.com>
To:	"Luck, Tony" <tony.luck@...el.com>
Cc:	Seiji Aguchi <seiji.aguchi@....com>,
	"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"mikew@...gle.com" <mikew@...gle.com>,
	"dle-develop@...ts.sourceforge.net" 
	<dle-develop@...ts.sourceforge.net>,
	Satoru Moriya <satoru.moriya@....com>,
	"dzickus@...hat.com" <dzickus@...hat.com>
Subject: Re: [RFC][PATCH v2 2/3] Hold multiple logs

On Tue, Jul 24, 2012 at 08:54:59PM +0000, Luck, Tony wrote:

> Now we panic. Pstore asks EFI "Do you have any space?" EFI replies "No". Pstore can't even overwrite
> one of the old OOPs records ... because it thinks they have all been erased. So we lose the panic
> log.

I think we inevitably lose in that scenario. I'd need to verify, but my 
recollection is that overwriting existing variables may be equivalent to 
a delete/create cycle.

-- 
Matthew Garrett | mjg59@...f.ucam.org
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