Fwd: Grub support for btrfs zstd compression?

[Tor-björn Claesson]

Hello!

I hope this is the right venue for this question.

Does the current grub (2.04-15) support booting from a btrfs filesystem
with zstd-compression?

I recently installed debian testing to a root subvolume on zstd-compressed
btrfs raid1, which failed to boot, citing inability to find drives
belonging to the btrfs raid array. Disabling compression on /boot,
/initrd.img and /vmlinuz, reinstalling the kernel package and rebuilding
the initramfs fixed this.
There was however another error generating the initramfs-image, which I
fixed, but which confuses me as to the cause of my boot problems.

I looked through the changelog of grub-efi-amd64 but did not find a mention
of cherry picking zstd-support. Does this mean it does not currently
support booting off a zstd compressed btrfs volume and would you in this
case like me to file a bug report? Trying to fix this, if desirable, would
be a nice learning experience for me.

Best regards,
Tor-björn Claesson
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