Hello Prarit,

Il giorno mer 8 nov 2023 alle ore 16:33 Prarit Bhargava
[off-list ref] ha scritto:

On 9/14/23 07:27, Alessandro Carminati (Red Hat) wrote:

quoted

Update kernel-parameters.txt to reflect new deferred signature
verification.
Enhances boot speed by allowing unsigned modules in initrd after
bootloader check.

Signed-off-by: Alessandro Carminati (Red Hat) <redacted>
---
  Documentation/admin-guide/kernel-parameters.txt | 9 +++++++++
  1 file changed, 9 insertions(+)

diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 0c38a8af95ce..beec86f0dd05 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt

@@ -3410,6 +3410,15 @@
                      Note that if CONFIG_MODULE_SIG_FORCE is set, that
                      is always true, so this option does nothing.

+     module_sig_check_wait=
+                     This parameter enables delayed activation of module
+                     signature checks, deferring the process until userspace
+                     triggers it. Once activated, this setting becomes
+                     permanent and cannot be reversed. This feature proves
+                     valuable for incorporating unsigned modules within
+                     initrd, especially after bootloader verification.
+                     By employing this option, boot times can be quicker.
+

Please keep these in alphabetical order.

Would making the kernel-parameters.txt warning a little bit more
informative be a good thing?  This should only be used in environments
where some other signature verification method is employed.

Also, for future reference, it would be good to have hard numbers to
show the boot time improvement in the changelog.

I'll do the necessary adjustments in the v2, thank you for your feedback.

P.

quoted

      module_blacklist=  [KNL] Do not load a comma-separated list of
                      modules.  Useful for debugging problem modules.