linux-kernel - Re: Oops after cd /sys/.../cpufreq/; rmmod; cat stats/time_in

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Message-Id: <20070321201042.f1cbf4d8.akpm@linux-foundation.org>
Date:	Wed, 21 Mar 2007 20:10:42 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Greg KH <gregkh@...e.de>
Cc:	Dave Jones <davej@...hat.com>, Alexey Dobriyan <adobriyan@...ru>,
	linux-kernel@...r.kernel.org
Subject: Re: Oops after cd /sys/.../cpufreq/; rmmod; cat stats/time_in_state

On Wed, 21 Mar 2007 21:00:06 -0700 Greg KH <gregkh@...e.de> wrote:

> On Wed, Mar 21, 2007 at 11:51:04PM -0400, Dave Jones wrote:
> > On Wed, Mar 21, 2007 at 08:07:53PM -0700, Greg KH wrote:
> >  
> >  > > After modprobe/rmmod cpufreq/stats directory appears but doesn't get
> >  > > removed. Should it?
> >  > Well, one can argue that those stats should never be in sysfs at all
> >  > anyway, I mean come on, a histogram in sysfs?  That's, not ok.
> > 
> > Meh, it's only a cheesy debug thing, so it's not really that big a deal imo.
> > it could probably move to debugfs (we didn't have that when it was merged iirc)
> > I doubt anyone really cares enough to bother though I wouldn't
> > be averse to a patch.
> 
> Yeah, I realize this, I'm not trying to find fault, sorry if it came
> across that way.  And yes, it should move to debugfs some day, but if it
> does, I'll loose my "what not to put in sysfs" example I use in
> presentations :)
> 

I ain't picky, but as a short-term thing it'd be kinda nice if it didn't
oops the kernel.
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