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Help with trimming modules.gz to minimum size?

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flyingfishfinger:
Hi,
I'm looking for a bit of assistance with trimming modules.gz. I've read the remastering guide and I should just be able to remove stuff I don't need and repack it, correct?

To that end, the "drivers/net" folder is the largest and under "ethernet" alone I find 3.5MB of stuff. I've got a Realtek chipset, so would I be correct in saying I can delete every folder in that directory except the Realtek one, to start with?

Is there a good method to take this further, like looking at what things DO get loaded when I boot Core on my machine and then delete everything that doesn't?

Cheers,
R

Rich:
Hi flyingfishfinger

--- Quote from: flyingfishfinger on January 16, 2020, 06:06:59 PM ---Hi,
I'm looking for a bit of assistance with trimming modules.gz. I've read the remastering guide and I should just be able to remove stuff I don't need and repack it, correct? ...
--- End quote ---
Yes.


--- Quote ---To that end, the "drivers/net" folder is the largest and under "ethernet" alone I find 3.5MB of stuff. I've got a Realtek chipset, so would I be correct in saying I can delete every folder in that directory except the Realtek one, to start with?
--- End quote ---
Modules can have dependencies, and they might be in other folders.


--- Quote ---Is there a good method to take this further, like looking at what things DO get loaded when I boot Core on my machine and then delete everything that doesn't?
--- End quote ---
I suppose you could use the output of:

--- Code: ---lsmod
--- End code ---
to decide which modules to keep. First make sure you've run all your installed programs in case any of them rely on any of the
modules included in the base. Here's a brief summary on unpacking/repacking the  modules.gz  file:

--- Code: ---# Unpack  modules.gz  which is in the current directory
tc@E310:~$ mkdir -p tmp/extract
tc@E310:~$ cd tmp/extract/
tc@E310:~/tmp/extract$ zcat ../../modules64.gz | cpio -i -H newc -d
43955 blocks
# Make your changes, then repack modules.gz
tc@E310:~/tmp/extract$ depmod -a -b . 4.19.10-tinycore64
depmod: ./kernel.tclocal: No such file or directory
tc@E310:~/tmp/extract$ find lib usr | cpio -o -H newc | gzip -9 > ../modules64.gz
# The new  modules.gz  is in  tc@E310:~/tmp/
--- End code ---
Replace  4.19.10-tinycore64  with the version you are running.

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