Em Thu, Aug 03, 2023 at 11:02:46AM -0700, Nick Desaulniers escreveu: > Hi Martin (and BTF/BPF team), > I've observed 2 user reports with the error from the subject of this email. > https://github.com/ClangBuiltLinux/linux/issues/1825 > https://bbs.archlinux.org/viewtopic.php?id=284177 > > Any chance you could take a look at these reports and help us figure > out what's going wrong here? Nathan and I haven't been able to > reproduce, but this seems to be affecting OpenMandriva (and Tomasz). > > Sounds like perhaps llvm-objcopy vs gnu objcopy might be a relevant detail? Masami had a problem with new versions of compilers that was solved with: ------------------------ 8< -------------------------------------------- > To check that please tweak: > > ⬢[acme@toolbox perf-tools-next]$ grep DWARF ../build/v6.2-rc5+/.config > CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y > # CONFIG_DEBUG_INFO_DWARF4 is not set > # CONFIG_DEBUG_INFO_DWARF5 is not set > ⬢[acme@toolbox perf-tools-next]$ > > i.e. disable CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT and enable > CONFIG_DEBUG_INFO_DWARF4. Hm, with CONFIG_DEBUG_INFO_DWARF4, no warning were shown. LD .tmp_vmlinux.btf BTF .btf.vmlinux.bin.o LD .tmp_vmlinux.kallsyms1 And / # strings /sys/kernel/btf/vmlinux | wc -l 89921 / # strings /sys/kernel/btf/vmlinux | grep -w kfree kfree It seems the BTF is correctly generated. (with DWARF5, the number of symbols are about 30000.)
