Messages in this thread | | | Date | Tue, 1 Jul 2008 17:14:15 +0200 | From | Uwe Kleine-König <> | Subject | Re: A minimally power-aware driver treats all messages as SUSPEND? |
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Hello Rafael,
Rafael J. Wysocki wrote: > On Tuesday, 1 of July 2008, Uwe Kleine-König wrote: > > include/linux/pm.h claims: > > > > A minimally power-aware driver treats all messages as SUSPEND > > [...]. > > > > This was introduced in commit 82bb67f2 by David Brownell. At this time > > PM_EVENT_HIBERNATE didn't exist. This was added in 3a2d5b70 by Rafael > > J. Wysocki without updating the above sentence. I think a minimally > > power-aware driver should treat all messages as HIBERNATE, shouldn't it? > > No, I don't think so. In the majority of cases, SUSPEND is equivalent to the > combination of FREEZE and HIBERNATE. I didn't get that. I thought SUSPEND is suspend-to-ram and HIBERNATE is suspend-to-disk, so HIBERNATE is the "deeper sleep". With that I might have to do less on SUSPEND because some state might be preserved after the machine comes up again.
> Still, this is going to change anyway with the introduction of the new > suspend/hibernation callbacks that are scheduled for 2.6.27. in next?
Best regards Uwe
-- Uwe Kleine-König, Software Engineer Digi International GmbH Branch Breisach, Küferstrasse 8, 79206 Breisach, Germany Tax: 315/5781/0242 / VAT: DE153662976 / Reg. Amtsgericht Dortmund HRB 13962 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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