From: Oliver Neukum <oliver@neukum.org>
To: linux-pm@lists.linux-foundation.org
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>,
Raffaele Recalcati <lamiaposta71@gmail.com>,
davinci-linux-open-source@linux.davincidsp.com,
linux-kernel@vger.kernel.org
Subject: Re: [linux-pm] pm loss development
Date: Sat, 14 May 2011 20:53:34 +0200 [thread overview]
Message-ID: <201105142053.34920.oliver@neukum.org> (raw)
In-Reply-To: <201105122127.44484.rjw@sisk.pl>
Am Donnerstag, 12. Mai 2011, 21:27:44 schrieb Rafael J. Wysocki:
> 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?
If you know that power is failing in a few miliseconds, only stuff that can lead to data
corruption is vital. In that timeframe you can't even flush buffers.
Regards
Oliver
next prev parent reply other threads:[~2011-05-14 18:51 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
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 ` Oliver Neukum [this message]
2011-05-14 20:34 ` [linux-pm] " 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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