From: Tony Lindgren <tony@atomide.com>
To: Pavel Machek <pavel@ucw.cz>
Cc: Jacek Anaszewski <j.anaszewski@samsung.com>,
Hans de Goede <hdegoede@redhat.com>,
Jacek Anaszewski <jacek.anaszewski@gmail.com>,
linux-leds@vger.kernel.org, linux-omap@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, Darren Hart <dvhart@infradead.org>
Subject: Re: PM regression with LED changes in next-20161109
Date: Thu, 10 Nov 2016 10:55:37 -0700 [thread overview]
Message-ID: <20161110175537.GF27724@atomide.com> (raw)
In-Reply-To: <20161110162925.GA28832@amd>
* Pavel Machek <pavel@ucw.cz> [161110 09:29]:
> Hi!
>
> > >>>Looks like commit 883d32ce3385 ("leds: core: Add support for poll()ing
> > >>>the sysfs brightness attr for changes.") breaks runtime PM for me.
> > >>>
> > >>>On my omap dm3730 based test system, idle power consumption is over 70
> > >>>times higher now with this patch! It goes from about 6mW for the core
> > >>>system to over 440mW during idle meaning there's some busy timer now
> > >>>active.
> > >>>
> > >>>Reverting this patch fixes the issue. Any ideas?
>
> Are you using any LED that toggles with high frequency? Like perhaps
> LED that is lit when CPU is active?
Yeah one of them seems to have cpu0 as the default trigger.
Tony
next prev parent reply other threads:[~2016-11-10 17:55 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-09 19:23 PM regression with LED changes in next-20161109 Tony Lindgren
2016-11-09 20:45 ` Jacek Anaszewski
2016-11-10 8:49 ` Hans de Goede
2016-11-10 12:56 ` Jacek Anaszewski
2016-11-10 13:04 ` Hans de Goede
2016-11-10 13:55 ` Jacek Anaszewski
2016-11-10 16:36 ` Pavel Machek
2016-11-10 16:29 ` Pavel Machek
2016-11-10 16:44 ` Hans de Goede
2016-11-10 20:48 ` Pavel Machek
2016-11-11 8:25 ` Hans de Goede
2016-11-10 17:55 ` Tony Lindgren [this message]
2016-11-10 20:29 ` Pavel Machek
2016-11-10 21:34 ` Jacek Anaszewski
2016-11-11 12:01 ` Pavel Machek
2016-11-11 17:03 ` Jacek Anaszewski
2016-11-11 19:28 ` Hans de Goede
2016-11-11 22:12 ` Pavel Machek
2016-11-12 8:03 ` Hans de Goede
2016-11-13 9:10 ` Three different LED brightnesses (was Re: PM regression with LED changes in next-20161109) Pavel Machek
2016-11-13 9:44 ` Hans de Goede
2016-11-13 20:45 ` Pavel Machek
2016-11-12 10:24 ` PM regression with LED changes in next-20161109 Jacek Anaszewski
2016-11-12 10:33 ` Hans de Goede
2016-11-12 19:14 ` Jacek Anaszewski
2016-11-12 21:14 ` Hans de Goede
2016-11-13 11:44 ` Jacek Anaszewski
2016-11-13 13:52 ` Hans de Goede
2016-11-14 9:12 ` Jacek Anaszewski
2016-11-14 12:51 ` Hans de Goede
2016-11-15 10:01 ` Jacek Anaszewski
2016-11-15 10:09 ` Hans de Goede
2016-11-15 10:31 ` LEDs that change brightness "itself" -- that's a trigger. " Pavel Machek
2016-11-15 10:58 ` Jacek Anaszewski
2016-11-15 11:11 ` Pavel Machek
2016-11-15 11:21 ` Hans de Goede
2016-11-15 11:48 ` Pavel Machek
2016-11-15 12:06 ` Hans de Goede
2016-11-15 12:11 ` Pavel Machek
2016-11-15 13:28 ` Jacek Anaszewski
2016-11-15 13:48 ` Hans de Goede
2016-11-15 14:04 ` Jacek Anaszewski
2016-11-15 14:30 ` Hans de Goede
2016-11-15 14:41 ` Jacek Anaszewski
2016-11-17 22:12 ` Hans de Goede
2016-11-15 11:17 ` Hans de Goede
2016-11-14 8:31 ` Pavel Machek
2016-11-11 22:06 ` Pavel Machek
2016-11-10 8:34 ` Hans de Goede
2016-11-10 15:11 ` Tony Lindgren
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