Kernel

Tips And Tricks

Q:

How can I prevent kernel modules from starting?

A:

Just put them in the blacklist.

Q:

How can I put kernel modules in blacklist?

A:

Add the line

blacklist moduleName

to

/etc/modprobe.d/blacklist.conf

or, in just one step, run

# echo "blacklist moduleName" >> /etc/modprobe.d/blacklist.conf

Q:

How can I add modules to kernel?

A:

It is possible to use insmod or modprobe. In most cases modprobe is preferred because it discovers if the module that is going to be added needs other modules and resolves dependencies.

# modprobe moduleName

Q:

How can I use multiple cores to speed up kernel compiling?

A:

Using the -jN parameter make splits his entire work in N jobs:

$ make -j4 bzImage

I used -j4 because of my Intel Atom D525 (2 cores, 2 threads each core).

Q:

How can I create a kernel configuration file (.config) from my local settings?

A:

I recently discovered a fast way to obtain a .config file from le local modules and drivers loaded in my system. Inside the kernel source folder you can run the command:

# make localmodconfig

to create also modules and initrds, or:

# make localyesconfig

to create a big monolith.