linux-kernel - Re: [PATCH 0/2] be2iscsi: Logging neatening

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Date:	Sun, 14 Aug 2016 10:29:50 -0700
From:	Joe Perches <joe@...ches.com>
To:	Bart Van Assche <Bart.VanAssche@...disk.com>,
	Christophe JAILLET <christophe.jaillet@...adoo.fr>,
	"linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>
Cc:	Jayamohan Kallickal <jayamohan.kallickal@...gotech.com>,
	Ketan Mukadam <ketan.mukadam@...gotech.com>,
	John Soni Jose <sony.john@...gotech.com>,
	"James E.J. Bottomley" <jejb@...ux.vnet.ibm.com>,
	"Martin K. Petersen" <martin.petersen@...cle.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 0/2] be2iscsi: Logging neatening

On Sun, 2016-08-14 at 17:09 +0000, Bart Van Assche wrote:

> My primary concern is how to enable and disable log messages from user 
> space. Many drivers define their own logging macros and export a bitmask 
> that allows to enable and disable logging messages per category. These 
> bitmask control mechanisms are annoying because figuring out what bit 
> controls which message category requires a search through the driver 
> source code. I'd like to see all these custom logging macros disappear 
> and being replaced by a single mechanism. The "dynamic debug" mechanism 
> e.g. is in my opinion much easier to use than the different custom 
> logging mechanisms.

Dynamic debug doesn't have a bitmask function and
still requires looking through the code for lines
and format strings.

I think you are looking for a system wide equivalent
for the ethtool/netif_<level> mechanism.

Nothing like that exists currently.

Some code uses a bitmask/and, other code uses a
level/comparison.

Care to propose something?