** Description changed:
- kmod add zstd support
+ [Impact]
- * v27+ needs patches cherrypicked from v28
+ * To safe diskspace, upcoming devel series / hwe kernels may turn on
+ zstd kernel module compression. Kmod since impish support zstd support.
+ But in order to keep hwe kernels at parity, or allow inspecting jammy
+ modules from focal host, it would be beneficial for kmod in focal to
+ support zstd compressed modules.
- * v28+ needs new build-time deps adjusted
+ [Test Plan]
+
+ * Pick any kernel module
+
+ * Compress it with zstd: $ zstd *.ko
+
+ * Check that modinfo can read it: $ modinfo *.ko.zst
+
+ [Where problems could occur]
+
+ * kmod will gain a new dependecy on libzstd1, however it should already
+ be present, because dpkg in focal depends on libzstd1 already.
+
+ * initramfs-tools already supports compressed modules, but in focal at
+ the moment it does so in an inefficient manner (regresses bootspeed),
+ this has been improved in
+ https://launchpad.net/ubuntu/+source/initramfs-tools/0.140ubuntu8 and is
+ yet to be SRUed into Focal.
** Also affects: kmod (Ubuntu Impish)
Importance: Undecided
Status: New
** Also affects: kmod (Ubuntu Jammy)
Importance: Undecided
Status: Fix Released
** Also affects: kmod (Ubuntu Focal)
Importance: Undecided
Status: New
** Changed in: kmod (Ubuntu Impish)
Status: New => Fix Released
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https://bugs.launchpad.net/bugs/1933491
Title:
kmod add zstd support
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