On Tue, Jul 11, 2023 at 01:28:28AM +0200, Benjamin Drung wrote:
> > > Okay. It works now. The not-compressed cpio archive must not be the last
> > > one. So the order is now:
> > >
> > > * AMD/Intel microcode cpio archive (on amd64)
> > > * compressed kernel modules / firmware (not compressed)
> > > * main cpio archive (compressed)
> > >
> > > I'll really stop now. For a first comparison, the firmware files need to
> > > be converted correctly. There are symlinks in /lib/firmware. So running
> > > following was not correct/enough:
> > >
> > > find /lib/firmware -name '*.bin' | while read -r fw; do
> > > sudo zstd -19 -z -o "${fw}.zst" "$fw"
> > > sudo rm "$fw"
> > > done
> > >
> > > If you want to help, hand me a correct conversion script.> > Some filenames in /lib/firmware contain spaces. There are many more > > files than .bin ones. A number of the files are readmes. > > Recent changes in linux-firmware.git add "install-xz" and "install-zstd" > > targets to make than will do what you want I guess. I haven't checked > > that this was actually merged; it was discussed at least on 2023-03-01 > > on the mailing-list. It's probably the best path forward in any case. > > In case it isn't merged, you can have a look at > > https://lore.kernel.org/linux-firmware/20230301-fixes-and-compression-v2-0-e2b71974e...@gmail.com/T/ > I agree. The conversion script was just for a quick way to test. The > clean approach would be to patch linux-firmware to produce two > additional binary packages: linux-firmware-zst and linux-firmware-xz. We need to find an upgrade path here that doesn't involve having to have multiple linux-firmware binary packages with different compression types. Ending up with three copies of the firmware in /lib on disk because of different dependencies is not an improvement! I understand the reason for being concerned about keeping uncompressed firmware available is that not all kernels have support for compressed firmware. However we should work out a path that lets us switch to compressed firmware on releases where we know it's supported. What kernel version introduced support for this? -- Steve Langasek Give me a lever long enough and a Free OS Debian Developer to set it on, and I can move the world. Ubuntu Developer https://www.debian.org/ slanga...@ubuntu.com vor...@debian.org
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