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. > Parsing pvs output would be easy, and will behave exactly the same as > this patch. >
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