bpftune: support a "no BTF" mode of operation #54
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on some systems BPF Type Format (BTF) info is not available. Because we make extensive use of it, we need a separate set of BPF programs that work in a "no BTF" world; these cannot make use of Compile Once - Run Everywhere (CO-RE) relocations, so data structure offsets may be wrong for the running kernel, so warn the user. Tuners cannot be supported in this mode because the likeliehood of such issues is nearly 100%; warn the user about this. Reported-by: Stuart Shelton <https://github.com/srcshelton> Signed-off-by: Alan Maguire <[email protected]>
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on some systems BPF Type Format (BTF) info is not available. Because we make extensive use of it, we need a separate set of BPF programs that work in a "no BTF" world; these cannot make use of Compile Once - Run Everywhere (CO-RE) relocations, so data structure offsets may be wrong for the running kernel, so warn the user.
Tuners cannot be supported in this mode because the likeliehood of such issues is nearly 100%; warn the user about this.
Reported-by: Stuart Shelton https://github.com/srcshelton