linux-kernel - Re: [PATCH 2/6] Staging: hv: hv.c Removed all DPRINT and debug

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Date:	Wed, 23 Feb 2011 17:29:24 -0800
From:	Greg KH <greg@...ah.com>
To:	Joe Perches <joe@...ches.com>
Cc:	Hank Janssen <hjanssen@...rosoft.com>,
	"gregkh@...e.de" <gregkh@...e.de>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"virtualization@...ts.osdl.org" <virtualization@...ts.osdl.org>,
	"devel@...uxdriverproject.org" <devel@...uxdriverproject.org>
Subject: Re: [PATCH 2/6] Staging: hv: hv.c Removed all DPRINT and debug -
 using pr_err now

On Wed, Feb 23, 2011 at 04:57:29PM -0800, Joe Perches wrote:
> On Wed, 2011-02-23 at 23:17 +0000, Hank Janssen wrote:
> > > -----Original Message-----
> > > From: Greg KH [mailto:greg@...ah.com]
> > > Sent: Wednesday, February 23, 2011 1:57 PM
> > > They where compile and run tested. And syslog was not a mess. What did
> > > > I mess up here? The amount of printouts now are a fraction of what
> > > > they where before.
> > > You forgot to put '\n' at the end of all of your pr_XXX lines, so they will be
> > > merged with the next one, messing up your syslog.  Joe also pointed this
> > > problem out.
> > > Take a look at your syslog to see what I am talking about...
> 
> Greg, there probably isn't any problem with his syslog.
> 
> Running together of messages without terminating newlines
> did used to happen though until commit
> 5fd29d6ccbc98884569d6f3105aeca70858b3e0f
> ("printk: clean up handling of log-levels and newlines")
> changed behavior so that newlines are emitted if necessary
> before every "<.>" loglevel but "<c>".
> 
> That means that adding trailing newlines to pr_<level>
> calls aren't _really_ necessary unless the pr_<level>
> is followed by a bare printk without KERN_<LEVEL>.

Ah, I didn't realize that this had changed, my mistake, nevermind :)

> I still think it's better from a style perspective to keep
> adding terminating newlines until most all of the printks
> are converted to pr_<level>.

Yes, that would be good to have done.

thanks,

greg k-h
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