Messages in this thread | | | Date | Fri, 14 Feb 2003 12:23:21 -0600 | From | Corey Minyard <> | Subject | Re: Kexec, DMA, and SMP |
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Werner Almesberger wrote:
|Corey Minyard wrote: | |>Yes, we were talking about temporary stopgaps. | | |Yes, that's what Suparna and Eric were discussing :-) | |>But, I had another idea. What about using power management? If you |>suspended everything, would that be good enough. I looked at a few |>drivers, and it seemed so. | | |As long as you don't need any form of synchronization to power |down a device, and if it comes up silent (i.e. no "sleep" mode, |in which it still has enough power to remember DMA lists and |such), that would work. | |I'd suspect that power management requiries you to synchronize, |so we're back to square one.
Yes, some do and some don't. You could define a new state for the "suspend" call that says "just shut down with no locks". But the infrastructure is already in the PCI code and others to do a suspend, you could use that and take it out of all the CONFIG_PM ifdefs.
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