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Hi. On Thu, 2004-09-16 at 21:18, Pavel Machek wrote: > Hi! > > > Here are two patches for the driver model, which have been in use in > > suspend2 for around a month. > > > > The first provides support for keeping part of the device tree alive > > while suspending the remainder. This is accomplished by abstracting the > > dpm_active, dpm_off and dpm_irq lists into a new struct partial device > > I believe this is wrong approach. > > For atomic snapshot to work, all devices need to be stopped. If your > video card does DMA, it needs to be stopped. So all drivers need to > know, you can not just exclude part of tree. Sorry. Perhaps I wasn't clear enough. I do suspend these devices. But I do it later: Suspend all other drivers. Write pageset 2 (page cache). Suspend used drivers. Make atomic copy. Resume used drivers. Write pageset 1 (atomic copy) Suspend used drivers. Power down all. And vice versa at resume time. > Now, you probably do not want disks to spin down and you want your > screen unblanked (as an optimalization/speedup). Patch for keeping > disk up is allready in -mm. Patch for keeping radeonfb up looks like > this, and is pending, too. Mm. Don't forget i8xx and the gazillion other drivers there :>. I see this is using the SYSTEM_SNAPSHOT value. Do those changes look like being merged to Linus soon? Regards, Nigel -- Nigel Cunningham Pastoral Worker Christian Reformed Church of Tuggeranong PO Box 1004, Tuggeranong, ACT 2901 Many today claim to be tolerant. True tolerance, however, can cope with others being intolerant. - 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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