On Apr 29, 2015 5:35 PM, "Olaf Hering" <o...@aepfle.de> wrote: > > On Wed, Apr 29, Vladimir 'phcoder' Serbinenko wrote: > > > > > On Apr 29, 2015 5:10 PM, "Olaf Hering" <o...@aepfle.de> wrote: > > > > > > On Wed, Apr 29, Vladimir 'φ-coder/phcoder' Serbinenko wrote: > > > > > > > I'm aware of the problem and I fully agree with you. Automatic install > > > > doesn't use those and I think the reason for it was to specify root in > > > > early days of porting. I don't think it's used for anything nowadays. > > > > > > For PV guests the use case is simple: provide a generic grub binary, > > > which recognizes optional knobs from the domU.cfg. This will be used to > > > select one of the configured devices as root. > > More details on this one please. Both command line and grub binary are on host. > > How is managing changing one is different from the other? > > Not sure what you are asking, but: > The distro provides a static binary, which has a certain level of > features. And some of the features can be controlled from the outside by > some knobs. The feature is to select a certain drive without user > interaction, This info is already in grub.cfg. Why does grub.cfg need help to find disk with distro if it already contains a refence to it?
>and the knob is a string in the cmdline in the PV domU > case. > > > > > Also unless there is a good usecase for having command line parsing, I'm > > > > all for killing existing ieee1275 parsing altogether and not introducing > > > > any parsing in the future. > > > So you want to dumb it down to the 80s PC level, even if some firmware > > > implementations can set knobs?! > > "It's shiny and new" or "this is from 80s" are fallacies and not arguments. > > Its not new that a firmware provides an interface to query its > properties AND that a firmware provides an interface the adjust > properties. OF does that. EFI maybe, no idea. And in some sense a PV > guest via its cmdline does that as well. I have however not looked how > the cmdline is passed to the PV kernel and how its retrieved in the PV > kernel. > And your point is? Just that something is available doesn't mean it's useful > My laptop with its BIOS provides nothing like that because the concept > is based on the PC from the 80s. Or whatever. > > Olaf > > _______________________________________________ > Grub-devel mailing list > Grub-devel@gnu.org > https://lists.gnu.org/mailman/listinfo/grub-devel
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