linux-kernel - Re: [PATCH 8] PM: Allow user space to change the power.async

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Message-ID: <20090828070124.GB27928@elf.ucw.cz>
Date:	Fri, 28 Aug 2009 09:01:25 +0200
From:	Pavel Machek <pavel@....cz>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	linux-pm <linux-pm@...ts.linux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>, Len Brown <lenb@...nel.org>,
	Alan Stern <stern@...land.harvard.edu>,
	ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
	Arjan van de Ven <arjan@...radead.org>,
	Zhang Rui <rui.zhang@...el.com>,
	Linux PCI <linux-pci@...r.kernel.org>
Subject: Re: [PATCH 8] PM: Allow user space to change the
	power.async_suspend flag of devices

On Fri 2009-08-28 00:24:06, Rafael J. Wysocki wrote:
> On Thursday 27 August 2009, Dmitry Torokhov wrote:
> > Hi Rafael,
> > 
> > On Thu, Aug 27, 2009 at 09:20:55PM +0200, Rafael J. Wysocki wrote:
> > > From: Rafael J. Wysocki <rjw@...k.pl>
> > > 
> > > Add sysfs attribute power/async for every device allowing the user
> > > space to access the device's power.async_suspend flag and modify it,
> > > if necessary.
> > > 
> > 
> > I don't think we should let users meddle with individual devices;
> > one global flag should be enough to work around "broken-at-the-moment"
> > issues.
> 
> Well, this patch is handy for testing if anyone is interested, so I posted it.
> 
> It isn't exactly safe, though, you're right.

I guess it would be acceptable to let the users disable it
per-driver... but if we can get without that, it would be better.

(it is obviously ok for debugging).
									Pavel

-- 
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