linux-kernel - Re: [patch 2/8] 2.6.22-rc3 perfmon2 : Debug messages added

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Message-ID: <20070620202216.GA26200@frankl.hpl.hp.com>
Date:	Wed, 20 Jun 2007 13:22:16 -0700
From:	Stephane Eranian <eranian@....hp.com>
To:	David Rientjes <rientjes@...gle.com>
Cc:	Robert Richter <robert.richter@....com>,
	Andi Kleen <andi@...stfloor.org>, linux-kernel@...r.kernel.org
Subject: Re: [patch 2/8] 2.6.22-rc3 perfmon2 : Debug messages added

David,

On Wed, Jun 20, 2007 at 12:49:05PM -0700, David Rientjes wrote:
> On Wed, 20 Jun 2007, Robert Richter wrote:
> 
> > Debug messages added for better debugging.
> > 
> 
> And you added BUG_ON()'s.
> 
> > Signed-off-by: Robert Richter <robert.richter@....com>
> > 
> > Index: linux-2.6.22-rc3/perfmon/perfmon_file.c
> > ===================================================================
> > --- linux-2.6.22-rc3.orig/perfmon/perfmon_file.c
> > +++ linux-2.6.22-rc3/perfmon/perfmon_file.c
> > @@ -192,6 +192,8 @@ static int pfm_mmap(struct file *file, s
> >  	unsigned long flags;
> >  	int ret;
> >  
> > +	PFM_DBG("pfm_file_ops");
> 
> After commenting on your first set of patches, I've been using it a little 
> more.  In my use, these debugging messages weren't very helpful because 
> "pfm_file_ops" can indicate pfm_mmap, pfm_read, pfm_poll, etc.  Could 
> these be changed to be more specific based on the function they're in?
> 
the PFM_DBG() macro adds the CPU, function name and line number to the
printed string.

-- 

-Stephane
-
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