linux-kernel - Re: [lm-sensors] Adding critical/fault limits to hwmon sysfs API

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Date:	Wed, 23 Jun 2010 10:21:44 -0700
From:	Guenter Roeck <guenter.roeck@...csson.com>
To:	Jean Delvare <khali@...ux-fr.org>
CC:	"lm-sensors@...sensors.org" <lm-sensors@...sensors.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [lm-sensors] Adding critical/fault limits to hwmon sysfs API

On Wed, Jun 23, 2010 at 12:34:37PM -0400, Jean Delvare wrote:
> Hi Guenter,
> 
> On Wed, 23 Jun 2010 08:03:25 -0700, Guenter Roeck wrote:
> > On Wed, Jun 23, 2010 at 10:29:11AM -0400, Jean Delvare wrote:
> > > I expected a counter-proposal of this kind. The problem I see is that
> > > the new limit we are adding is unrelated to _min. However, the other
> > > _min_* file we have (_min_alarm) expresses something which is relative
> > > to _min. Same as _max_hyst and _crit_hyst, which are relative to _max
> > > and _critn respectively. So I have the feeling that _min_crit sends the
> > > wrong signal to the reader. Especially if we keep _crit for the high
> > > bound, the asymmetry raises questions.
> > > 
> > > This is my rationale for suggesting _crit and _lcrit. Now, I won't
> > > argue forever if others disagree, these is really only a naming
> > > convention and everything will be fine as long as the drivers and
> > > libsensors agree.
> > 
> > Makes sense. No strong opinion on my side, really. Using crit/lcrit is fine for me as well.
> > Maybe we should wait if there is input from others and go with lcrit if there is none.
> 
> OK, fine with me.
> 
> > On a side note, libsensors does not support inX_fault today, even though 
> > it is mentioned in the API, and there is no currX_fault. Likewise, libsensors supports 
> > currX_alarm but it is not mentioned in hwmon/sysfs-interface.
> > Unless there are objections, I'll clean that up when I add support for the _[l]crit objects.
> 
> Yes, please!
> 
> > Also, lib/sensors.conf.5 has a comment "Likewise, tempX_crit often comes with tempX_max_crit".
> > Since tempX_max_crit does not exist, it might make sense to remove that comment.
> 
> Does the sentence make sense if you replace tempX_max_crit with
> tempX_crit_hyst? Looks like a copy-paste-edit mistake (that would be
> from me.)

Yes, I think that is the problem. I'll fix that together with the other changes.

Guenter
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