Moving a bunch of folks + lists to BCC. On Thu, Feb 4, 2021 at 3:54 PM Andrii Nakryiko <andrii.nakryiko@xxxxxxxxx> wrote: > > On Wed, Feb 3, 2021 at 7:13 PM Nick Desaulniers <ndesaulniers@xxxxxxxxxx> wrote: > > > > On Wed, Feb 3, 2021 at 6:58 PM Andrii Nakryiko > > <andrii.nakryiko@xxxxxxxxx> wrote: > > > > > > On Wed, Feb 3, 2021 at 5:31 PM Nick Desaulniers <ndesaulniers@xxxxxxxxxx> wrote: > > > > > > > > On Sun, Jan 17, 2021 at 12:14 PM Arnaldo Carvalho de Melo > > > > <acme@xxxxxxxxxx> wrote: > > > > > > > > > > Em Fri, Jan 15, 2021 at 03:43:06PM -0800, Yonghong Song escreveu: > > > > > > > > > > > > > > > > > > On 1/15/21 3:34 PM, Nick Desaulniers wrote: > > > > > > > On Fri, Jan 15, 2021 at 3:24 PM Yonghong Song <yhs@xxxxxx> wrote: > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > On 1/15/21 1:53 PM, Sedat Dilek wrote: > > > > > > > > > En plus, I encountered breakage with GCC v10.2.1 and LLVM=1 and > > > > > > > > > CONFIG_DEBUG_INFO_DWARF4. > > > > > > > > > So might be good to add a "depends on !DEBUG_INFO_BTF" in this combination. > > > > > > > > > > > > > > Can you privately send me your configs that repro? Maybe I can isolate > > > > > > > it to a set of configs? > > > > > > > > > > > > > > > > > > > > > > > I suggested not to add !DEBUG_INFO_BTF to CONFIG_DEBUG_INFO_DWARF4. > > > > > > > > It is not there before and adding this may suddenly break some users. > > > > > > > > > > > > > > > > If certain combination of gcc/llvm does not work for > > > > > > > > CONFIG_DEBUG_INFO_DWARF4 with pahole, this is a bug bpf community > > > > > > > > should fix. > > > > > > > > > > > > > > Is there a place I should report bugs? > > > > > > > > > > > > You can send bug report to Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>, > > > > > > dwarves@xxxxxxxxxxxxxxx and bpf@xxxxxxxxxxxxxxx. > > > > > > > > > > I'm coming back from vacation, will try to read the messages and see if > > > > > I can fix this. > > > > > > > > IDK about DWARF v4; that seems to work for me. I was previously observing > > > > https://bugzilla.redhat.com/show_bug.cgi?id=1922698 > > > > with DWARF v5. I just re-pulled the latest pahole, rebuilt, and no > > > > longer see that warning. > > > > > > > > I now observe a different set. I plan on attending "BPF office hours > > > > tomorrow morning," but if anyone wants a sneak peak of the errors and > > > > how to reproduce: > > > > https://gist.github.com/nickdesaulniers/ae8c9efbe4da69b1cf0dce138c1d2781 > > > > > > > > > > Is there another (easy) way to get your patch set without the b4 tool? > > > Is your patch set present in some patchworks instance, so that I can > > > download it in mbox format, for example? > > > > $ wget https://lore.kernel.org/lkml/20210130004401.2528717-2-ndesaulniers@xxxxxxxxxx/raw > > -O - | git am > > $ wget https://lore.kernel.org/lkml/20210130004401.2528717-3-ndesaulniers@xxxxxxxxxx/raw > > -O - | git am > > > > If you haven't tried b4 yet, it's quite nice. Hard to go back. Lore > > also has mbox.gz links. Not sure about patchwork. > > > > Ok, I managed to apply that on linux-next, but I can't get past this: > > ld.lld: error: undefined symbol: pa_trampoline_start > >>> referenced by arch/x86/realmode/rm/header.o:(real_mode_header) Thanks for testing and the report. Do you have a .config you can send me to reproduce? > > ld.lld: error: undefined symbol: pa_trampoline_header > >>> referenced by arch/x86/realmode/rm/header.o:(real_mode_header) > > ld.lld: error: undefined symbol: pa_trampoline_pgd > >>> referenced by arch/x86/realmode/rm/header.o:(real_mode_header) > >>> referenced by trampoline_64.S:142 (/data/users/andriin/linux/arch/x86/realmode/rm/trampoline_64.S:142) > >>> arch/x86/realmode/rm/trampoline_64.o:(startup_32) > > ld.lld: error: undefined symbol: pa_wakeup_start > >>> referenced by arch/x86/realmode/rm/header.o:(real_mode_header) > > ld.lld: error: undefined symbol: pa_wakeup_header > >>> referenced by arch/x86/realmode/rm/header.o:(real_mode_header) > > ld.lld: error: undefined symbol: pa_machine_real_restart_asm > >>> referenced by arch/x86/realmode/rm/header.o:(real_mode_header) > > ld.lld: error: undefined symbol: pa_startup_32 > >>> referenced by trampoline_64.S:77 (/data/users/andriin/linux/arch/x86/realmode/rm/trampoline_64.S:77) > >>> arch/x86/realmode/rm/trampoline_64.o:(trampoline_start) > > ld.lld: error: undefined symbol: pa_tr_flags > >>> referenced by trampoline_64.S:124 (/data/users/andriin/linux/arch/x86/realmode/rm/trampoline_64.S:124) > >>> arch/x86/realmode/rm/trampoline_64.o:(startup_32) > > ld.lld: error: undefined symbol: pa_tr_cr4 > >>> referenced by trampoline_64.S:138 (/data/users/andriin/linux/arch/x86/realmode/rm/trampoline_64.S:138) > >>> arch/x86/realmode/rm/trampoline_64.o:(startup_32) > > ld.lld: error: undefined symbol: pa_tr_efer > >>> referenced by trampoline_64.S:146 (/data/users/andriin/linux/arch/x86/realmode/rm/trampoline_64.S:146) > >>> arch/x86/realmode/rm/trampoline_64.o:(startup_32) > >>> referenced by trampoline_64.S:147 (/data/users/andriin/linux/arch/x86/realmode/rm/trampoline_64.S:147) > >>> arch/x86/realmode/rm/trampoline_64.o:(startup_32) > > ld.lld: error: undefined symbol: pa_startup_64 > >>> referenced by trampoline_64.S:161 (/data/users/andriin/linux/arch/x86/realmode/rm/trampoline_64.S:161) > >>> arch/x86/realmode/rm/trampoline_64.o:(startup_32) > > ld.lld: error: undefined symbol: pa_tr_gdt > >>> referenced by arch/x86/realmode/rm/trampoline_64.o:(tr_gdt) > >>> referenced by reboot.S:28 (/data/users/andriin/linux/arch/x86/realmode/rm/reboot.S:28) > >>> arch/x86/realmode/rm/reboot.o:(machine_real_restart_asm) > > ld.lld: error: undefined symbol: pa_machine_real_restart_paging_off > >>> referenced by reboot.S:34 (/data/users/andriin/linux/arch/x86/realmode/rm/reboot.S:34) > >>> arch/x86/realmode/rm/reboot.o:(machine_real_restart_asm) > > ld.lld: error: undefined symbol: pa_machine_real_restart_idt > >>> referenced by reboot.S:47 (/data/users/andriin/linux/arch/x86/realmode/rm/reboot.S:47) > >>> arch/x86/realmode/rm/reboot.o:(machine_real_restart_asm) > > ld.lld: error: undefined symbol: pa_machine_real_restart_gdt > >>> referenced by reboot.S:54 (/data/users/andriin/linux/arch/x86/realmode/rm/reboot.S:54) > >>> arch/x86/realmode/rm/reboot.o:(machine_real_restart_asm) > >>> referenced by arch/x86/realmode/rm/reboot.o:(machine_real_restart_gdt) > > ld.lld: error: undefined symbol: pa_wakeup_gdt > >>> referenced by arch/x86/realmode/rm/wakeup_asm.o:(wakeup_gdt) > CC arch/x86/mm/numa_64.o > CC arch/x86/mm/amdtopology.o > HOSTCC arch/x86/entry/vdso/vdso2c > make[4]: *** [arch/x86/realmode/rm/realmode.elf] Error 1 > make[3]: *** [arch/x86/realmode/rm/realmode.bin] Error 2 > make[2]: *** [arch/x86/realmode] Error 2 > make[2]: *** Waiting for unfinished jobs.... > > > Hopefully Arnaldo will have better luck. > > > > > > > > > > > > > > (FWIW: some other folks are hitting issues now with kernel's lack of > > > > DWARF v5 support: https://bugzilla.redhat.com/show_bug.cgi?id=1922707) > > > > > > -- > > Thanks, > > ~Nick Desaulniers -- Thanks, ~Nick Desaulniers
