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| author | Wolfgang Müller | 2022-04-26 19:11:35 +0200 |
|---|---|---|
| committer | Wolfgang Müller | 2022-04-26 19:27:11 +0200 |
| commit | 34f213ac35ded6b8c824704d6e65fc775837aa39 (patch) | |
| tree | ee20b6a9c3388f729669739a75e67ff39c01778e /kern.1 | |
| parent | c51013909b5eb64671902e02b9a19d0fd11fbd46 (diff) | |
| download | kern-34f213ac35ded6b8c824704d6e65fc775837aa39.tar.gz | |
Use /proc/config.gz for config diffs
diff_kernel relies on the existence of the /boot/config-{kernel} file
which is usually installed by the install-kernel script. This file may
be missing on systems with a custom install workflow or EFI systems that
use the systemd install_kernel functionality. The latter installs the
EFI stub kernel only, no auxiliary files of any kind. Comparisons
against the /boot/config-{kernel} file therefore fail on such systems.
This commit attempts to support a wider range of install workflows by
extracting the config from /proc/config.gz instead. Regardless of how
the kernel is installed, this particular file should exist as long as
CONFIG_IKCONFIG is enabled in the running kernel.
A word about "running config": The way that phrase was used previous to
this commit is technically inaccurate, since the "running config" could
change by installing a kernel and replacing the config file under /boot.
Now we *always* refer to the configuration saved within the currently
running kernel.
Diffstat (limited to 'kern.1')
| -rw-r--r-- | kern.1 | 7 |
1 files changed, 5 insertions, 2 deletions
@@ -105,8 +105,11 @@ to display the differences between the generated kernel configuration and .Pp If no config is given, this command compares against the configuration of the currently running kernel. -This requires the configuration file to be present under -.Pa /boot . +This requires a kernel configuration to be present under +.Pa /proc/config.gz . +See the +.Sy CONFIG_IKCONFIG +configuration option in the kernel for more information. .It Sy build Builds the selected kernel. .It Sy install |