Hi Arnaldo, Just a few datapoints: My build machine (Debian Testing PowerpcLE, not quite the latest kernel): On Thu, 23 Mar 2023 10:27:36 -0300 Arnaldo Carvalho de Melo <acme@xxxxxxxxxx> wrote: > Which improves a bit the situation. > > We could check if bpftool is available and if not, suggest installing > it. $ ls -l /usr/sbin/bpftool -rwxr-xr-x 1 root root 790504 Mar 6 02:33 /usr/sbin/bpftool > If it is available, we could check if /sys/kernel/bpf/ is available, if > not suggest using a kernel with CONFIG_DEBUG_INFO_BTF=y, as most distros > have by now. $ uname -a Linux zz1 6.0.0-5-powerpc64le #1 SMP Debian 6.0.10-2 (2022-12-01) ppc64le GNU/Linux $ ls -l /sys/kernel/bpf/ ls: cannot access '/sys/kernel/bpf/': No such file or directory $ grep CONFIG_DEBUG_INFO_BTF /boot/config-6.0.0-5-powerpc64le # CONFIG_DEBUG_INFO_BTF is not set And in the latest powerpc64le kernel: $ grep CONFIG_DEBUG_INFO_BTF /boot/config-6.1.0-5-powerpc64le # CONFIG_DEBUG_INFO_BTF is not set Debian Testing arm64, not quite the latest kernel: $ uname -a Linux oak 6.1.0-5-arm64 #1 SMP Debian 6.1.12-1 (2023-02-15) aarch64 GNU/Linux $ ls -l /sys/kernel/bpf/ ls: cannot access '/sys/kernel/bpf/': No such file or directory $ grep CONFIG_DEBUG_INFO_BTF /boot/config-6.1.0-5-arm64 CONFIG_DEBUG_INFO_BTF=y CONFIG_DEBUG_INFO_BTF_MODULES=y Debian Testing amd64, the latest kernel: $ uname -a Linux pine 6.1.0-6-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.15-1 (2023-03-05) x86_64 GNU/Linux $ ls -l /sys/kernel/bpf/ ls: cannot access '/sys/kernel/bpf/': No such file or directory $ grep CONFIG_DEBUG_INFO_BTF /boot/config-6.1.0-6-amd64 CONFIG_DEBUG_INFO_BTF=y CONFIG_DEBUG_INFO_BTF_MODULES=y Debian Stable amd64, the latest kernel: $ uname -a Linux gimli 5.10.0-21-cloud-amd64 #1 SMP Debian 5.10.162-1 (2023-01-21) x86_64 GNU/Linux $ ls -l /sys/kernel/bpf/ ls: cannot access '/sys/kernel/bpf/': No such file or directory $ grep CONFIG_DEBUG_INFO_BTF /boot/config-5.10.0-21-cloud-amd64 CONFIG_DEBUG_INFO_BTF=y -- Cheers, Stephen Rothwell
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