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From: "Rafael J. Wysocki" <rjw@sisk.pl>
To: Raffaele Recalcati <lamiaposta71@gmail.com>
Cc: linux-pm@lists.linux-foundation.org,
	davinci-linux-open-source@linux.davincidsp.com,
	linux-kernel@vger.kernel.org
Subject: Re: pm loss development
Date: Fri, 13 May 2011 18:54:57 +0200	[thread overview]
Message-ID: <201105131854.57854.rjw@sisk.pl> (raw)
In-Reply-To: <BANLkTikZkRW6TWMcWyZC4_TdAWgjXDqvYA@mail.gmail.com>

On Friday, May 13, 2011, Raffaele Recalcati wrote:
> Hi Rafael,
> 
> 2011/5/12 Rafael J. Wysocki <rjw@sisk.pl>:
> > On Thursday, May 12, 2011, Raffaele Recalcati wrote:
> >> What happen normally in runtime pm implementation is that every devices
> >> are switched off and are enabled only when needed.
> >> In our case instead we have a completely functional embedded system and,
> >> when an asyncrhonous event appear, we have only some tens milliseconds
> >> before the actual power failure takes place.
> >> This patchset add a support in order to switch off not vital part of the system,
> >> in order to allow the board to survive longer.
> >> This allow the possibility to save important data.
> >
> > OK, so first, who decides what parts of the system are vital and what aren't?
> 
> Take a quick look at Documentation/power/loss.txt  paragrpah "2.4
> Power loss policies".
> You can decide what can be powered off.

I read the patches.  My question was about the general idea of who should
be responsible of making these decisions.

Thanks,
Rafael

  reply	other threads:[~2011-05-13 16:54 UTC|newest]

Thread overview: 35+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-05-12 17:11 Raffaele Recalcati
2011-05-12 17:11 ` [PATCH 1/4] export bus_kset Raffaele Recalcati
2011-05-12 19:28   ` Rafael J. Wysocki
2011-05-13 17:11     ` Davide Ciminaghi
2011-05-15 14:13       ` [linux-pm] " Davide Ciminaghi
2011-05-17 23:04         ` Rafael J. Wysocki
2011-05-12 17:11 ` [PATCH 2/4] PM / Loss: power loss management Raffaele Recalcati
2011-05-12 19:57   ` Rafael J. Wysocki
2011-05-13 13:02     ` Davide Ciminaghi
2011-05-17 23:32       ` Rafael J. Wysocki
2011-05-19  9:26         ` Davide Ciminaghi
2011-05-19 14:25           ` [linux-pm] " Alan Stern
2011-05-19 20:52             ` Rafael J. Wysocki
2011-05-12 17:11 ` [PATCH 3/4] mmc: bus and block device drivers: support for pm_loss Raffaele Recalcati
2011-05-12 17:11 ` [PATCH 4/4] DaVinci: vpfe: " Raffaele Recalcati
2011-05-12 19:27 ` pm loss development Rafael J. Wysocki
2011-05-13  6:39   ` Raffaele Recalcati
2011-05-13 16:54     ` Rafael J. Wysocki [this message]
2011-05-14 16:35       ` [linux-pm] " mark gross
2011-05-17 23:07         ` Rafael J. Wysocki
2011-05-18  3:12           ` mark gross
2011-05-18 19:43             ` Rafael J. Wysocki
2011-05-18 22:17               ` Mark Brown
2011-05-19 12:45               ` mark gross
2011-06-02 22:21               ` Pavel Machek
2011-06-14 14:06                 ` mark gross
2011-06-14 14:36                   ` Alan Cox
2011-05-14 20:21       ` Raffaele Recalcati
2011-05-17 23:10         ` Rafael J. Wysocki
2011-05-14 18:53   ` [linux-pm] " Oliver Neukum
2011-05-14 20:34     ` Raffaele Recalcati
2011-05-17 23:06       ` Rafael J. Wysocki
2011-05-14 16:24 ` mark gross
2011-05-14 20:30   ` Raffaele Recalcati
2011-05-14 23:33     ` mark gross

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