linux-kernel - Re: [PATCH 0/5] dev_<level> and dynamic

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Message-ID: <1347029921.13424.14.camel@joe2Laptop>
Date:	Fri, 07 Sep 2012 07:58:41 -0700
From:	Joe Perches <joe@...ches.com>
To:	Jason Baron <jbaron@...hat.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>, netdev@...r.kernel.org,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	"David S. Miller" <davem@...emloft.net>,
	Jim Cromie <jim.cromie@...il.com>, Kay Sievers <kay@...y.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/5] dev_<level> and dynamic_debug cleanups

On Thu, 2012-09-06 at 11:43 -0700, Joe Perches wrote:
> On Thu, 2012-09-06 at 13:51 -0400, Jason Baron wrote:
> > On Sun, Aug 26, 2012 at 04:25:25AM -0700, Joe Perches wrote:
> > > The recent commit to fix dynamic_debug was a bit unclean.
> > > Neaten the style for dynamic_debug.
> > > Reduce the stack use of message logging that uses netdev_printk
> > > Add utility functions dev_printk_emit and dev_vprintk_emit for /dev/kmsg.
[]
> > The one thing that is bothering me though, is that for
> > __dynamic_dev_dbg(), __dynamic_netdev_dbg(), we are copying much of the core
> > logic of __dev_printk(), __netdev_printk(), respectively. I would prefer
> > have this in one place. Can we add a 'prefix' argument to __dev_printk(),
> > and __netdev_printk() that dynamic debug can use, but is simply empty
> > for dev_printk() and netdev_printk().
> 
> I don't think that's an improvement actually.

Because it would add an always effectively unused "" argument
to dev_printk and netdev_printk calls in non dynamic_debug
builds.

dynamic_debug is still mostly a developer feature and I
believe most distros do not enable it.


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