From: Kevin Hilman <khilman@deeprootsystems.com>
To: Artem.Bityutskiy@nokia.com
Cc: Russell King - ARM Linux <linux@arm.linux.org.uk>,
Richard Woodruff <r-woodruff2@ti.com>,
linux-arm-kernel@lists.arm.linux.org.uk,
linux-omap@vger.kernel.org,
Jouni Hogander <jouni.hogander@nokia.com>,
Paul Walmsley <paul@pwsan.com>
Subject: Re: [PATCH 01/11] OMAP2/3: PM: push core PM code from linux-omap
Date: Tue, 19 May 2009 07:57:26 -0700 [thread overview]
Message-ID: <87fxf187jd.fsf@deeprootsystems.com> (raw)
In-Reply-To: <4A124875.1080503@nokia.com> (Artem Bityutskiy's message of "Tue\, 19 May 2009 08\:49\:41 +0300")
Artem Bityutskiy <Artem.Bityutskiy@nokia.com> writes:
> Kevin Hilman wrote:
>>> The problem here is that such an interface is extremely fragile. Consider
>>> what happens if a program disables HLT, and then gets killed off for some
>>> reason. How does this reference get balanced again?
>>>
>>> I think a better solution would be a char device driver which has to be
>>> kept open as long as a reference is held. When userspace closes it (be
>>> that because the program has exited, been killed, etc) you can drop any
>>> pending references.
>>
>> OK, this interface is not intended for users/applications. It is
>> intended only for OMAP PM developers who are developing the PM code
>> and want to prevent idle for various reasons during development. It
>> is not intended for productions systems.
>>
>> What about leaving /sys/power/sleep_while_idle but only if
>> CONFIG_PM_DEBUG=y?
>
> Sounds like debugfs is the good place for this then.
>
Sound OK to me.
Kevin
next prev parent reply other threads:[~2009-05-19 14:57 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-15 18:40 [PATCH 00/11] OMAP2/3: PM sync-up Kevin Hilman
2009-05-15 18:40 ` [PATCH 01/11] OMAP2/3: PM: push core PM code from linux-omap Kevin Hilman
2009-05-15 18:40 ` [PATCH 02/11] OMAP: Add new function to check wether there is irq pending Kevin Hilman
2009-05-15 18:40 ` [PATCH 03/11] OMAP3: PM: Force IVA2 into idle during bootup Kevin Hilman
2009-05-15 18:40 ` [PATCH 04/11] OMAP3: PM: Add wake-up bit defintiions for CONTROL_PADCONF_X Kevin Hilman
2009-05-15 18:40 ` [PATCH 05/11] OMAP3: PM: UART: disable clocks when idle and off-mode support Kevin Hilman
2009-05-15 18:40 ` [PATCH 06/11] OMAP3: PM: Add D2D clocks and auto-idle setup to PRCM init Kevin Hilman
2009-05-15 18:40 ` [PATCH 07/11] OMAP3: PM: D2D clockdomain supports SW supervised transitions Kevin Hilman
2009-05-15 18:40 ` [PATCH 08/11] OMAP3: PM: Ensure MUSB block can idle when driver not loaded Kevin Hilman
2009-05-15 18:40 ` [PATCH 09/11] OMAP3: PM: Ensure PRCM interrupts are cleared at boot Kevin Hilman
2009-05-15 18:40 ` [PATCH 10/11] OMAP3: PM: Clear pending PRCM reset flags on init Kevin Hilman
2009-05-15 18:40 ` [PATCH 11/11] OMAP3: PM: prevent module wakeups from waking IVA2 Kevin Hilman
2009-05-18 13:16 ` [PATCH 08/11] OMAP3: PM: Ensure MUSB block can idle when driver not loaded Russell King - ARM Linux
2009-05-18 14:50 ` Kevin Hilman
2009-05-18 15:04 ` Tony Lindgren
2009-05-18 13:32 ` [PATCH 01/11] OMAP2/3: PM: push core PM code from linux-omap Russell King - ARM Linux
2009-05-18 17:00 ` Kevin Hilman
2009-05-18 17:06 ` Russell King - ARM Linux
2009-05-18 17:28 ` Kevin Hilman
2009-05-19 5:49 ` Artem Bityutskiy
2009-05-19 14:57 ` Kevin Hilman [this message]
2009-05-19 18:55 ` Kevin Hilman
2009-05-28 13:43 ` Russell King - ARM Linux
2009-05-18 17:08 ` Kevin Hilman
2009-05-18 18:30 ` Russell King - ARM Linux
2009-05-18 19:04 ` Woodruff, Richard
2009-05-18 20:24 ` Russell King - ARM Linux
2009-05-18 20:47 ` Woodruff, Richard
2009-05-18 21:11 ` Russell King - ARM Linux
2009-05-18 21:19 ` Woodruff, Richard
2009-05-19 0:23 ` Kevin Hilman
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