linux-kernel - Re: [PATCH for review] ACPI: Create /sys/firmware/acpi/interrupts/ counters

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Message-Id: <200802052058.50663.lenb@kernel.org>
Date:	Tue, 5 Feb 2008 20:58:50 -0500
From:	Len Brown <lenb@...nel.org>
To:	Greg KH <gregkh@...e.de>
Cc:	linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH for review] ACPI: Create /sys/firmware/acpi/interrupts/ counters

On Tuesday 05 February 2008 18:18, Greg KH wrote:
> On Tue, Feb 05, 2008 at 06:12:09PM -0500, Len Brown wrote:
> > On Tuesday 05 February 2008 17:18, Greg KH wrote:
> > > On Tue, Feb 05, 2008 at 02:30:10AM -0500, Len Brown wrote:
> > > > # cat /sys/firmware/acpi/interrupts/summary
> > > > pm_timer     0
> > > > glbl_lock    0
> > > > power_btn    0
> > > > sleep_btn    0
> > > > rtc          0
> > > > gpe00    0
> > ...
> > > > gpe1F    0
> > > > gpe_hi    0
> > > > gpe_total   63
> > > > acpi_irq    63
> > > 
> > > Eeek!  Why?  What's wrong with individual files here?
> > 
> > My expectation is that this is a shell interface for debugging,
> > not an API for programs.  ala /proc/interrupts.
> 
> Great, then use debugfs for it.  Please, don't put debug stuff like this
> in sysfs, that's not what it is there for.  You can do whatever you want
> in debugfs :)

Can you point to a model of good behaviour that I can copy?

note that I want this information to be available on every system,
just like /proc/interrupts is.

/proc/ has seqfile support, is there a reason I shouldn't use it?
I'd banned additional files from /proc/acpi for a long time
since the directory layout was ill-conceived.  But maybe I
should re-consider the headlong rush to use sysfs?

thanks,
-Len
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