Enable debug logging for GRUB rescue shell options

[sairon]

If the system fails to boot, some kernel messages may not be shown before the system fully boots. Enable the debug option for rescue shell options to have an easy way to see those without modifying GRUB options. This will increase log verbosity and turn on debug logging for Systemd as well [1].

[1] https://www.freedesktop.org/software/systemd/man/latest/systemd.html#debug

Summary by CodeRabbit

• New Features
  • Added a debug parameter to the boot configuration for both "Slot A" and "Slot B" rescue shell options to enhance troubleshooting capabilities during system initialization.

[coderabbitai]

Walkthrough

Walkthrough

The pull request modifies the GRUB configuration file to append the debug parameter to the command line for two boot menu options: "Slot A (rescue shell)" and "Slot B (rescue shell)." This change enables debug mode during the boot process for both slots, allowing for more detailed output during system initialization.

Changes

File Path	Change Summary
buildroot-external/board/pc/grub.cfg	Added debug parameter to the linux command line for "Slot A (rescue shell)" and "Slot B (rescue shell)."

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Recent review details

Configuration used: CodeRabbit UI
Review profile: CHILL

Commits

Files that changed from the base of the PR and between 93ac046 and eccb218.

Files selected for processing (1)

• buildroot-external/board/pc/grub.cfg (1 hunks)

Additional comments not posted (2)

buildroot-external/board/pc/grub.cfg (2)

80-80: LGTM, but verify the impact of enabling debug mode.

The code change to enable debug mode for the rescue shell is approved.

However, please ensure that the increased log verbosity and potential performance impact of enabling debug mode are acceptable and align with the intended use case of the rescue shell.

To verify the impact, consider the following:

1. Review the Systemd documentation to understand the implications of enabling debug mode, such as increased log verbosity and potential performance overhead.

2. Test the rescue shell with debug mode enabled to assess the log verbosity and observe any noticeable performance impact during boot.

3. Confirm that the benefits of having access to detailed debug information in the rescue shell outweigh any potential drawbacks.

If you have any concerns or need further assistance with the verification, please let me know.

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84-84: Previous comment applies.

The review comment made for the "Slot A (rescue shell)" menu entry also applies to this "Slot B (rescue shell)" menu entry, as the code change and its implications are similar.

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[agners]

LGTM, thanks!