linux-ext4 - Re: [PATCH 2/9] ext4: Use pr_fmt and pr

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Date:	Mon, 19 Mar 2012 20:02:54 -0700
From:	Joe Perches <joe@...ches.com>
To:	Ted Ts'o <tytso@....edu>
Cc:	David Miller <davem@...emloft.net>, anca.emanuel@...il.com,
	adilger.kernel@...ger.ca, linux-ext4@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/9] ext4: Use pr_fmt and pr_<level>

On Mon, 2012-03-19 at 22:58 -0400, Ted Ts'o wrote:

[good stuff]

> Of course, the body of the message needs to be standardized too.  But
> that's orthogonal to the problem of passing the kernel structure which
> identifies the object which the log message is about.  That part is
> completely and utterly necessary if you're going to standardize the
> *first* part of the printable dmesg log, which contains the structured
> information.

All of what you say is true, but you're neglecting
the ability to scrape or notify a particular set of
per subsystem messages that pr_<level> could easily
provide that a bare printk could not.


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