Hi Karsten, On Wed, Nov 15, 2017 at 09:41:34PM +0100, Karsten Merker wrote: > > We then provide a default partitionning scheme. I'd like feedback on > > that one. I appreciate that having a good default in such a case, but > > I'd like to have a reasonably simple layout that works good enough to > > install a distro. I'm a bit short on background on what an EFI > > partition is supposed to look like, and what a good size would be. I'd > > really like some input on this. > > the partitioning scheme from patch no. 3 of this series looks like > follows: > > #define PARTS_DEFAULT \ > "name=loader1,start=8k,size=32k;" \ > "name=loader2,size=984k;" \ > "name=boot,size=128M,bootable;" \ > "name=system,size=-;" > > I assume that the intended use is > - loader1: SPL > - loader2: u-boot > - boot: Linux /boot > - system: Linux / > > AFAIK the UEFI spec requires that the EFI system partition (ESP) > is FAT-formatted. Most (probably all?) Linux package management > tooling assumes that files from packages are installed onto > filesystems that support POSIX semantics, including hardlinks, > which FAT does not. This means that distributions cannot re-use > an EFI system partition as /boot and therefore need a partition > for /boot and an additional ESP (AFAIK commonly mounted to > /boot/efi). I would therefore like to propose adding a small > separate partition for use as ESP.
The original intent of the "boot" partition wasn't really to store /boot, but to be a FAT partition to store the environment + whatever data needed for the EFI partition. Maybe we can rename it if it's confusing? Maxime -- Maxime Ripard, Free Electrons Embedded Linux and Kernel engineering http://free-electrons.com
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