linux-kernel - Re: logging on kernel panic

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Message-ID: <alpine.LRH.2.00.1206131552440.6369@twin.jikos.cz>
Date:	Wed, 13 Jun 2012 15:54:27 +0200 (CEST)
From:	Jiri Kosina <jkosina@...e.cz>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
Cc:	Mahmood Naderan <nt_mahmood@...oo.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: logging on kernel panic

On Wed, 13 Jun 2012, Alan Cox wrote:

> > Hi everybody
> > If a system receives kernel panic during boot, will it be logged somewhere?
> 
> Often not.. especially if it is fatal. Look up netconsole however.

Well your machine's BIOS can still be providing non-volatile sotrage which 
under recent kernels registers itself with 'pstore', and you can get the 
dmesg+panic from there then (provided you have all the necessary bits, 
such as APEI, compiled in and enabled).

-- 
Jiri Kosina
SUSE Labs

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