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

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Message-ID: <4BF3D17F.5000605@redhat.com>
Date:	Wed, 19 May 2010 08:54:39 -0300
From:	Mauro Carvalho Chehab <mchehab@...hat.com>
To:	Ingo Molnar <mingo@...e.hu>
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

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.

-- 

Cheers,
Mauro
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