layered: Make layered backwards compat with cpufreq #243
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It would be useful to be able to check whether a kfunc exists from rust user space. For example, now that we have support for adjusting cpufreq in scx_layered, we'll want to be able to test whether or not a the scx_bpf_cpuperf_set() (and friends) kfuncs are present for backwards compat purposes. Let's add a kfunc_exists() function to compat.rs for this purpose. Signed-off-by: David Vernet <void@manifault.com>
Only the very newest kernels support scx_bpf_cpuperf_set(). Let's update scx_layered to accommodate older kernels as well. Signed-off-by: David Vernet <void@manifault.com>
htejun
approved these changes
Apr 24, 2024
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Only the very newest kernels support scx_bpf_cpuperf_set(). Let's update
scx_layered to accommodate older kernels as well.