From: Pavel Machek <pavel@ucw.cz>
To: David Brownell <david-b@pacbell.net>
Cc: Andrew Morton <akpm@osdl.org>,
torvalds@osdl.org, linux-pm@lists.osdl.org
Subject: Re: RFC -- updated Documentation/power/devices.txt
Date: Wed, 12 Jul 2006 14:25:31 +0200 [thread overview]
Message-ID: <20060712122531.GA2094@elf.ucw.cz> (raw)
In-Reply-To: <200607111457.44161.david-b@pacbell.net>
Hi!
Not sure if I'm commenting on latest version...
> PM_EVENT_FREEZE -- quiesce the driver, but don't necessarily change into
> any low power mode. The driver's resume() will often be called soon.
> Neither wakeup events nor DMA are allowed.
>
> PM_EVENT_PRETHAW -- quiesce the driver, knowing that the upcoming resume()
> will restore a suspend-to-disk snapshot from a different kernel image.
> Drivers that are smart enough to look at their hardware state during
> resume() processing need that state to be correct ... a PRETHAW could
> be used to invalidate that state (by resetting the device). Other
> drivers might handle this the same way as PM_EVENT_FREEZE.
"Neither wakeup events nor DMA are allowed." should be added here,
too.
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
next prev parent reply other threads:[~2006-07-12 12:25 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-07-10 22:25 RFC -- updated Documentation/power/devices.txt David Brownell
2006-07-11 5:56 ` Andrew Morton
2006-07-11 16:38 ` David Brownell
2006-07-11 21:57 ` David Brownell
2006-07-12 12:25 ` Pavel Machek [this message]
2006-07-12 14:04 ` Alan Stern
2006-07-12 15:45 ` David Brownell
2006-07-12 16:03 ` Alan Stern
2006-07-23 1:37 ` David Brownell
2006-07-23 3:59 ` Alan Stern
2006-07-23 10:50 ` Rafael J. Wysocki
2006-07-23 13:03 ` Alan Stern
2006-07-23 22:45 ` Rafael J. Wysocki
2006-07-24 3:22 ` David Brownell
2006-07-24 9:46 ` Rafael J. Wysocki
2006-07-24 14:51 ` Alan Stern
2006-07-24 15:15 ` David Brownell
2006-07-24 15:42 ` Alan Stern
2006-07-24 17:11 ` David Brownell
2006-07-24 20:44 ` Alan Stern
2006-07-24 21:19 ` David Brownell
2006-07-25 15:42 ` Alan Stern
2006-08-10 23:38 ` [patch 2.6.18-rc] " David Brownell
2006-07-23 16:22 ` RFC -- " David Brownell
2006-07-11 14:40 ` Pavel Machek
2006-07-11 21:28 ` Pavel Machek
-- strict thread matches above, loose matches on Subject: below --
2006-07-11 7:56 Woodruff, Richard
2006-07-11 16:51 ` David Brownell
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