Le 27/09/2013 14:48, Vladimir 'φ-coder/phcoder' Serbinenko a écrit : > On 27.09.2013 12:39, Gabriel de Perthuis wrote: >> Le 26/09/2013 10:53, Vladimir 'φ-coder/phcoder' Serbinenko a écrit: >>> On 25.09.2013 14:39, Gabriel de Perthuis wrote: >>>> Hello, >>>> This patch lets grub install to a reserved area in LVM physical volumes. >>>> These bootloader areas can be created with LVM 2.02.99 and the >>>> --bootloaderareasize argument to pvcreate and vgconvert. >>>> I tested it in QEMU, installing to and booting a disk that contains a PV >>>> and no partition table. >>>> >>> This is not how the use of this area was imagined. There are couple of >>> subtleties which your patch didn't take in account. >>> Currently there is joint developpement with LVM guys but it wasn't >>> published yet. >> >> For anyone else who may be interested, apparently patches exist and are >> waiting for Peter Rajnoha to finish them. They haven't been posted or >> discussed publicly and I've never seen them. >> >> According to Vladimir: >>> the zone will be subdivided to cover more cases and the agreement was >> to use "pvs" to get offsets rather than having own code for this >> >> As shipped in 2.02.99, pvs exposes exactly one ba_start/ba_size area. >> Other areas will have to use extra extension fields and extra fields in >> the pvs output, to be compatible with released versions of LVM.
> No, you didn't understand: this area will have another header, GRUB one > which will subdivide it. LVM gives us area and we take care of subdivision. Or you could split the task in two: embed Grub on PVs, like it does on partition tables, ext2-ext4, Btrfs; then add advanced embedding that does some mini-partitioning of embedding areas. The first task is really easy and brings an immediate benefit in making LVM-only disks bootable. I don't feel qualified to discuss the second task, because I'm not seeing the use case. I don't think it's been brought up. _______________________________________________ Grub-devel mailing list Grub-devel@gnu.org https://lists.gnu.org/mailman/listinfo/grub-devel
