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Kethreveris
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Joined: 16 Feb 2009
Posts: 20
Location: Rethwallen
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 Posted: Thu Sep 05, 2024 1:04 am Post subject: Dracut compression defaults to ZSTD now? |
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Seems the default for "dracut" compression changed from "gzip" to "zstd" recently.
During a portage update on August 28th, 2024, "dracut" was updated, and I normally create a new initial RAM disk when that happens. Then I created a new Grub entry to use this new initial RAM disk, (leaving the old InitRD & Grub entry in place). Server could not boot with this new initial RAM disk, but complained about not being able to mount root, (I use ZFS root and EXT3 "/boot"). So initially I did not suspect "dracut".
Fussing with it, I noticed that during creation, "dracut" gave me a notice about using "zstd". I don't remember seeing that before. (And I routinely create new initial RAM disks when packages, like Virtual Box, or "dracut" are updated.)
| Code: | dracut[I]: *** Creating image file '/boot/linux-6.6.30-gentoo.1b.img' ***
dracut[I]: Using auto-determined compression method 'zstd'
dracut[I]: *** Creating initramfs image file '/boot/linux-6.6.30-gentoo.1b.img' done *** |
Anyone else see this?
Seems I did not activate "zstd" compression support everywhere in my kernel. Easy enough work around whence I understood the problem. Added this to my "dracut" configuration and made a new initial RAM disk;
Don't really need "zstd" for initial RAM disks. I have plenty of room on "/boot".
So, did the default compression for "dracut" change?
If so, how do I determine, (except for that message during creation), what compression program was used for my initial RAM disks?
The manual page for "dracut" says "gzip" is the default;
| Quote: | --gzip
Compress the generated initramfs using gzip. This will be done by default, unless another compression
option or --no-compress is passed. Equivalent to "--compress=gzip -9". |
Does that mean we need to update the manual page for "dracut"?
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Kethreveris, (aka Kethrery) |
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floppymaster
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Joined: 07 Jul 2010
Posts: 230
Location: Detroit, MI, USA
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Kethreveris
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Joined: 16 Feb 2009
Posts: 20
Location: Rethwallen
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| Posted: Thu Sep 05, 2024 6:31 am Post subject: |
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Thank you, that does seem likely to prevent the problem I had.
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Installing Gentoo
