linux-kernel - Re: Hardware Error Kernel Mini-Summit

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Message-ID: <20100520123716.GA2040@elte.hu>
Date:	Thu, 20 May 2010 14:37:16 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Mauro Carvalho Chehab <mchehab@...hat.com>
Cc:	Borislav Petkov <bp@...64.org>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Andi Kleen <andi@...stfloor.org>,
	"Luck, Tony" <tony.luck@...el.com>,
	Hidetoshi Seto <seto.hidetoshi@...fujitsu.com>,
	"Young, Brent" <brent.young@...el.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Ingo Molnar <mingo@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Matt Domsch <Matt_Domsch@...l.com>,
	Doug Thompson <dougthompson@...ssion.com>,
	Joe Perches <joe@...ches.com>,
	"bluesmoke-devel@...ts.sourceforge.net" 
	<bluesmoke-devel@...ts.sourceforge.net>,
	Linux Edac Mailing List <linux-edac@...r.kernel.org>
Subject: Re: Hardware Error Kernel Mini-Summit


* Mauro Carvalho Chehab <mchehab@...hat.com> wrote:

> Ingo Molnar wrote:
>
> > Regarding dmesg, there's a WIP patch on lkml that 
> > integrates printks into this framework as well - makes 
> > each printk also available as a special string event.
> > 
> > That way a tool can have both programmatic access to 
> > printk output (without having to interact with the 
> > syslog buffer itself) - together with all the other 
> > structured log sources, while humans can also see what 
> > is happening.
> 
> Some system admins prefer to have everything on dmesg, 
> as they can enable a serial console, and catch the logs 
> remotely, even when the machine crashes for example due 
> to a hardware failure.
> 
> So, IMHO, one feature that the perf event needs is the 
> capability to report errors via a serial console also, 
> or a mechanism where some events are sent via dmesg.

Yeah. That can be an aspect of the callback - or might 
even be integrated into the core code.

Thanks,

	Ingo
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