linux-kernel - Re: [PATCH v2 -mm 4/9] netconsole: Add some useful tips to documentation

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Date:	Wed, 11 Jul 2007 03:40:22 +0530 (IST)
From:	Satyam Sharma <ssatyam@....iitk.ac.in>
To:	Jesper Juhl <jesper.juhl@...il.com>
cc:	Matt Mackall <mpm@...enic.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Keiichi Kii <k-keiichi@...jp.nec.com>,
	Netdev <netdev@...r.kernel.org>,
	Joel Becker <joel.becker@...cle.com>,
	Stephen Hemminger <shemminger@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	David Miller <davem@...emloft.net>
Subject: Re: [PATCH v2 -mm 4/9] netconsole: Add some useful tips to documentation

Hi Jesper,

On Tue, 10 Jul 2007, Jesper Juhl wrote:
> On Tuesday 10 July 2007 11:41:43 Matt Mackall wrote:
> > On Tue, Jul 10, 2007 at 02:49:41PM +0530, Satyam Sharma wrote:
> > > From: Satyam Sharma <ssatyam@....iitk.ac.in>
> > >
> > > [4/9] netconsole: Add some useful tips to documentation
> > >
> > > Add some useful general-purpose tips.
> > >
> > > Signed-off-by: Satyam Sharma <ssatyam@....iitk.ac.in>
> > > Cc: Keiichi Kii <k-keiichi@...jp.nec.com>
> >
> > Acked-by: Matt Mackall <mpm@...enic.com>
> >
> > As long as we're on the subject, I've been meaning to add a note
> > telling people to set their console log level to something useful, as
> > having that set too low is the most common problem people encounter.
> 
> How about this?
> [...]
> +Some people forget to raise the kernels log_level to an
> +appropriate level and thus don't see all the kernel log messages they
> +expect. You can add the kernel boot option "ignore_loglevel" to see all
> +messages or you can use SysRq to set the log level to a specific value.
> +

IMHO something that mentions /proc/sys/kernel/printk would be better.

You don't need to have built with SysRq support for that, it's clearly
more flexible than the ignore_loglevel option and wouldn't require a
reboot either. I'll send out an updated patch shortly.

Satyam
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