What does linuxPackages_testing mean?

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1

I mean, how can I translate these names to actual kernel versions?

Does these mean different kernels for each architecture?

What is linuxPackages_testing on Raspberry Pi, as of right now? Is there a command to query that?

Is it that same kernel version for x86, right now?

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linuxPackages is defined here. The linuxKernel attribute they refer to is defined here and points to this file containing all of the kernels. As of the time of writing linuxPackages_testing points to packages built for kernel version 6.9-rc4. I don’t believe the kernel version referenced by these tags is affected by the architecture and platform right now, although in theory there could be a stdenv.isAarch64 conditional hidden somewhere, depending on how you set your localSystem or hostPlatform (i.e. how you instantiated your Nixpkgs).

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