Messages in this thread | | | From | "Rafael J. Wysocki" <> | Subject | Re: [ibm-acpi-devel] suspend/hibernation regression between 2.6.19 and 2.6.20 w/ Thinkpad T41 | Date | Wed, 8 Aug 2007 22:24:38 +0200 |
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On Wednesday, 8 August 2007 16:48, Henrique de Moraes Holschuh wrote: > On Wed, 08 Aug 2007, Rafael J. Wysocki wrote: > > > I wish we loaded the kernel just once, maybe from the boot loader. > > > > Well, that's not so easy. That will work for the bare image, but if we want it > > to be compressed and/or encrypted, then the boot loader will need to > > contain all of the necessary code. > > Doing things right always have an associated cost, or we'd be doing it right > since day one... > > > I may be doable by using a special boot kernel with ACPI disabled and only > > as many drivers as required to load the image, but that will make it more > > difficult to set up and to recover from errors. > > Better than the walking bomb we have now. When waking from suspend-to-disk, > we should not overwrite ANY non-kernel data which has ties to external > systems (the hardware, the firmware). Instead, we should re-init everything > (re-init hardware to make sure we know in which state it is, re-init > ourselves, to make sure we match the firmware and hardware state), as if we > were booting a cold system in the first place.
Yes, we've already had an agreement about that on linux-pm, now the problem is to implement it and not to break things in the process ...
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