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| <== Date ==> | <== Thread ==> |
|---|
| Subject: | Re: MRF kernel modules not seeing hardware |
| From: | "Shen, Guobao via Tech-talk" <tech-talk at aps.anl.gov> |
| To: | "Daykin, Evan" <daykin at frib.msu.edu>, "tech-talk at aps.anl.gov" <tech-talk at aps.anl.gov> |
| Date: | Wed, 29 Jan 2025 20:47:15 +0000 |
|
Even, Looks like you are missing the “System.map” file, as your message hinted. ChatGPT gives some suggestions as below: It looks like you're encountering an issue where the `System.map` file is missing during the kernel module installation. The `System.map` file is a key component for kernel debugging and the `depmod` utility,
which is responsible for managing module dependencies, relies on it to create the necessary module dependency files. Here’s a breakdown of what's going on and how to fix it: ### What’s Happening? - **Warning**: The kernel installation process is not able to find the `System.map` file. This file typically resides in the `/boot/` directory and contains a map of kernel symbols (i.e., the addresses of
kernel functions and variables). Without it, `depmod` cannot properly process the modules. ### Steps to Resolve: 1. **Verify if `System.map` exists**: Check if the `System.map` file exists in the `/boot/` directory for your kernel version. You can use: ```bash ls /boot | grep System.map ``` It should show something like `System.map-6.1.0-30-rt-amd64`. If it doesn’t appear, it could mean that the file wasn’t generated during the kernel installation. 2. **Rebuild the `System.map` file**: If the file is missing, you can rebuild it using `make` from the kernel source directory, assuming you have the kernel source for `6.1.0-30-rt-amd64` installed. To do this: - Navigate to the directory where the kernel source is located. - Run the following: ```bash make modules_prepare ``` This command prepares the kernel source tree for module compilation and will also regenerate the `System.map` file. 3. **Reinstall or Rebuild the Kernel**: In some cases, reinstalling or rebuilding the kernel might regenerate the necessary files. You can reinstall the kernel package or rebuild it using the package manager, for example, with `apt` on Debian-based
systems: ```bash sudo apt-get install --reinstall linux-image-6.1.0-30-rt-amd64 ``` 4. **Manually Generate the `System.map`**: If you have the kernel binary (`vmlinuz-6.1.0-30-rt-amd64`), you can manually generate the `System.map` using the following: ```bash nm /boot/vmlinuz-6.1.0-30-rt-amd64 > /boot/System.map-6.1.0-30-rt-amd64 ``` This will create the `System.map` file based on the symbols in the kernel image. 5. **Run `depmod` Manually**: After fixing the missing `System.map` file, you may want to run `depmod` manually to rebuild the module dependencies: ```bash sudo depmod -a ``` 6. **Check Kernel Headers**: Ensure the kernel headers are installed, as these are required for building modules: ```bash sudo apt-get install linux-headers-$(uname -r) ``` ### Final Check: Once you’ve taken these steps, check again if the warning goes away. You should now be able to install the PCI kernel module without issues. Let me know if this helps or if you're seeing any other errors! |