nixos: add a small section about kernel module dev
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@ -66,4 +66,25 @@ boot.kernel.sysctl."net.ipv4.tcp_keepalive_time" = 120;
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sets the kernel’s TCP keepalive time to 120 seconds. To see the
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available parameters, run <command>sysctl -a</command>.</para>
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<section>
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<title>Developing kernel modules</title>
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<para>When developing kernel modules it's often convenient to run
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edit-compile-run loop as quickly as possible.
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See below snippet as an example of developing <literal>mellanix</literal>
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drivers.
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</para>
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<screen><![CDATA[
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$ nix-build '<nixpkgs>' -A linuxPackages.kernel.dev
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$ nix-shell '<nixpkgs>' -A linuxPackages.kernel
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$ unpackPhase
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$ cd linux-*
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$ make -C $dev/lib/modules/*/build M=$(pwd)/drivers/net/ethernet/mellanox modules
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$ sudo insmod ./drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.ko
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]]></screen>
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</section>
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</chapter>
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