linux-kernel - Re: [PATCH 4/4] PCI: quirk print dev name with duration

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Date:	Wed, 15 Feb 2012 23:07:56 -0800
From:	Joe Perches <joe@...ches.com>
To:	Yinghai Lu <yinghai@...nel.org>
Cc:	Jesse Barnes <jbarnes@...tuousgeek.org>, linux-pci@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Arjan van de Ven <arjan@...radead.org>
Subject: Re: [PATCH 4/4] PCI: quirk print dev name with duration

On Wed, 2012-02-15 at 21:43 -0800, Joe Perches wrote:
> On Wed, 2012-02-15 at 21:35 -0800, Yinghai Lu wrote:
> > On Wed, Feb 15, 2012 at 9:25 PM, Joe Perches <joe@...ches.com> wrote:
> > > On Wed, 2012-02-15 at 21:14 -0800, Yinghai Lu wrote:
> > >> So could find out which device is involved with the calling
> > > []
> > >> +++ linux-2.6/drivers/pci/quirks.c
> > >> @@ -2854,14 +2854,15 @@ static void do_one_fixup_debug(void (*fn
> > >>       ktime_t calltime, delta, rettime;
> > >>       unsigned long long duration;
> > >>
> > >> -     printk(KERN_DEBUG "calling  %pF @ %i\n", fn, task_pid_nr(current));
> > >> +     printk(KERN_DEBUG "calling  %pF @ %i for %s\n",
> > >> +                     fn, task_pid_nr(current), dev_name(&dev->dev));
> > >
> > > Might be better to use dev_dbg
> > >
> > >        dev_dbg(&dev->dev, "calling %pF @ %i\n", fn, task_pid_nr(current));
> > >
> > > []
> > >
> > >> -     printk(KERN_DEBUG "pci fixup %pF returned after %lld usecs\n", fn,
> > >> -             duration);
> > >> +     printk(KERN_DEBUG "pci fixup %pF returned after %lld usecs for %s\n",
> > >> +                     fn, duration, dev_name(&dev->dev));
> > >
> > >        dev_dbg(&dev->dev, "pci fixup %pF returned after %llu usecs\n",
> > >                fn, duration);
> > Not sure if that is going to break Arjan 's tool that analyze the boot time.
> That depends on the tool code.
[]
> Do you have a link to the tool?

That tool would be scripts/bootgraph.pl and using
dev_dbg would break it unless it's adapted to the
change.  Your change seems fine for now.


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