linux-kernel - Re: logging on kernel panic

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Message-ID: <alpine.LNX.2.00.1206141001060.8644@pobox.suse.cz>
Date:	Thu, 14 Jun 2012 10:02:53 +0200 (CEST)
From:	Jiri Kosina <jkosina@...e.cz>
To:	Mahmood Naderan <nt_mahmood@...oo.com>
Cc:	Alan Cox <alan@...rguk.ukuu.org.uk>,
	"\"linux-kernel@...r.kernel.org\"" <linux-kernel@...r.kernel.org>,
	Cong Wang <xiyou.wangcong@...il.com>
Subject: Re: logging on kernel panic

On Wed, 13 Jun 2012, Mahmood Naderan wrote:

> >and you can get the dmesg+panic from there
>  Sorry where? in the bios?

Read Documentation/ABI/testing/pstore in the kernel sources.

> @Cong:
> >The kernel log may not hit /var/log/syslog when kernel panics,
> Can I ask why. Just before a panic, kernel is still alive and can log. 

At the point of panic, the machine is too dead to be able to perform such 
a complex operation as writing to filesystem.

-- 
Jiri Kosina
SUSE Labs
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