Hi, I'm looking into BTF and it's use case. Based on the document I understood to run BPF programs across different kernel versions, it needs to build with libbpf which depends on the BTF information. Now to enable/to have BTF information on any Kernel, the kernel needs to be re-build with "" flag.
I can see the BTF support in Linus introduced from *kernel version 5.1.0 (* https://www.kernel.org/doc/html/v5.1/bpf/btf.html?highlight=btf ) however I can still see the BTF information (/sys/kernel/btf/vmlinux) on my 4.18.0-193.28.1.el8_2.x86_64 kernel. I'm little confused here how old kernel can generate BTF info if the was support added recently. Can I get information about oldest linux kernel version that can support BTF? -=-=-=-=-=-=-=-=-=-=-=- Links: You receive all messages sent to this group. View/Reply Online (#1964): https://lists.iovisor.org/g/iovisor-dev/message/1964 Mute This Topic: https://lists.iovisor.org/mt/80980657/21656 Mute #bcc:https://lists.iovisor.org/g/iovisor-dev/mutehashtag/bcc Group Owner: iovisor-dev+ow...@lists.iovisor.org Unsubscribe: https://lists.iovisor.org/g/iovisor-dev/unsub [arch...@mail-archive.com] -=-=-=-=-=-=-=-=-=-=-=-
