Public bug reported:
If you use UEFI http boot to boot an image (rather than an EFI
executable) and get all the way to a normal userspace, you can access
the boot image as /dev/pmem0. But this is not accessible in the initrd;
presumably some modules are missing. Dimitri added some modules that are
clearly going to be necessary (kernel/drivers/nvdimm) in 0.140ubuntu14
and I added kernel/drivers/dax too in local experiments but this appears
not to be enough to get it to appear.
This is desirable because then you can just feed an installer ISO to a
machine via http boot and the installer just works as normal (the speed
and, uh, quality, of the implementation of HTTP in a given machine's
firmware may mean this isn't always the best option but it would be nice
if it worked in case someone's machine actually does this well).
** Affects: initramfs-tools (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1981385
Title:
initrd lacks modules to mount boot image from http boot
Status in initramfs-tools package in Ubuntu:
New
Bug description:
If you use UEFI http boot to boot an image (rather than an EFI
executable) and get all the way to a normal userspace, you can access
the boot image as /dev/pmem0. But this is not accessible in the
initrd; presumably some modules are missing. Dimitri added some
modules that are clearly going to be necessary (kernel/drivers/nvdimm)
in 0.140ubuntu14 and I added kernel/drivers/dax too in local
experiments but this appears not to be enough to get it to appear.
This is desirable because then you can just feed an installer ISO to a
machine via http boot and the installer just works as normal (the
speed and, uh, quality, of the implementation of HTTP in a given
machine's firmware may mean this isn't always the best option but it
would be nice if it worked in case someone's machine actually does
this well).
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/initramfs-tools/+bug/1981385/+subscriptions
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