On Mon, Mar 13, 2023 at 11:38 PM Naresh Kamboju <naresh.kamboju@xxxxxxxxxx> wrote: > > perf builds failing from Linux next-20230307..next-20230314 but pass on > Linux mainline v6.3-rc2. > > Reported-by: Linux Kernel Functional Testing <lkft@xxxxxxxxxx> Thanks for the report, but I'm not sure what's wrong here. We added __attribute__((packed)) attribute intentionally and want to keep it this way. It seems like perf itself is using packed structs (e.g., struct debug_line_header in util/genelf_debug.c), so I'm wondering why that code doesn't cause any problems. Any hints from perf folks? > > Build log: > --- > libbpf/staticobjs/zip.o > zip.c:35:8: error: packed attribute causes inefficient alignment for > 'magic' [-Werror=attributes] > 35 | __u32 magic; > | ^~~~~ > zip.c:40:8: error: packed attribute causes inefficient alignment for > 'this_disk' [-Werror=attributes] > 40 | __u16 this_disk; > | ^~~~~~~~~ > zip.c:45:8: error: packed attribute causes inefficient alignment for > 'cd_disk' [-Werror=attributes] > 45 | __u16 cd_disk; > | ^~~~~~~ > zip.c:50:8: error: packed attribute causes inefficient alignment for > 'cd_records' [-Werror=attributes] > 50 | __u16 cd_records; > | ^~~~~~~~~~ > zip.c:55:8: error: packed attribute causes inefficient alignment for > 'cd_records_total' [-Werror=attributes] > 55 | __u16 cd_records_total; > | ^~~~~~~~~~~~~~~~ > zip.c:58:8: error: packed attribute causes inefficient alignment for > 'cd_size' [-Werror=attributes] > 58 | __u32 cd_size; > | ^~~~~~~ > zip.c:63:8: error: packed attribute causes inefficient alignment for > 'cd_offset' [-Werror=attributes] > 63 | __u32 cd_offset; > | ^~~~~~~~~ > zip.c:66:8: error: packed attribute causes inefficient alignment for > 'comment_length' [-Werror=attributes] > 66 | __u16 comment_length; > | ^~~~~~~~~~~~~~ > zip.c:79:8: error: packed attribute causes inefficient alignment for > 'magic' [-Werror=attributes] > 79 | __u32 magic; > | ^~~~~ > zip.c:80:8: error: packed attribute causes inefficient alignment for > 'version' [-Werror=attributes] > 80 | __u16 version; > | ^~~~~~~ > zip.c:82:8: error: packed attribute causes inefficient alignment for > 'min_version' [-Werror=attributes] > 82 | __u16 min_version; > | ^~~~~~~~~~~ > zip.c:83:8: error: packed attribute causes inefficient alignment for > 'flags' [-Werror=attributes] > 83 | __u16 flags; > | ^~~~~ > zip.c:84:8: error: packed attribute causes inefficient alignment for > 'compression' [-Werror=attributes] > 84 | __u16 compression; > | ^~~~~~~~~~~ > zip.c:85:8: error: packed attribute causes inefficient alignment for > 'last_modified_time' [-Werror=attributes] > 85 | __u16 last_modified_time; > | ^~~~~~~~~~~~~~~~~~ > zip.c:86:8: error: packed attribute causes inefficient alignment for > 'last_modified_date' [-Werror=attributes] > 86 | __u16 last_modified_date; > | ^~~~~~~~~~~~~~~~~~ > zip.c:87:8: error: packed attribute causes inefficient alignment for > 'crc' [-Werror=attributes] > 87 | __u32 crc; > | ^~~ > zip.c:88:8: error: packed attribute causes inefficient alignment for > 'compressed_size' [-Werror=attributes] > 88 | __u32 compressed_size; > | ^~~~~~~~~~~~~~~ > zip.c:89:8: error: packed attribute causes inefficient alignment for > 'uncompressed_size' [-Werror=attributes] > 89 | __u32 uncompressed_size; > | ^~~~~~~~~~~~~~~~~ > zip.c:90:8: error: packed attribute causes inefficient alignment for > 'file_name_length' [-Werror=attributes] > 90 | __u16 file_name_length; > | ^~~~~~~~~~~~~~~~ > zip.c:91:8: error: packed attribute causes inefficient alignment for > 'extra_field_length' [-Werror=attributes] > 91 | __u16 extra_field_length; > | ^~~~~~~~~~~~~~~~~~ > zip.c:92:8: error: packed attribute causes inefficient alignment for > 'file_comment_length' [-Werror=attributes] > 92 | __u16 file_comment_length; > | ^~~~~~~~~~~~~~~~~~~ > zip.c:94:8: error: packed attribute causes inefficient alignment for > 'disk' [-Werror=attributes] > 94 | __u16 disk; > | ^~~~ > zip.c:95:8: error: packed attribute causes inefficient alignment for > 'internal_attributes' [-Werror=attributes] > 95 | __u16 internal_attributes; > | ^~~~~~~~~~~~~~~~~~~ > zip.c:108:8: error: packed attribute causes inefficient alignment for > 'magic' [-Werror=attributes] > 108 | __u32 magic; > | ^~~~~ > zip.c:110:8: error: packed attribute causes inefficient alignment for > 'min_version' [-Werror=attributes] > 110 | __u16 min_version; > | ^~~~~~~~~~~ > zip.c:111:8: error: packed attribute causes inefficient alignment for > 'flags' [-Werror=attributes] > 111 | __u16 flags; > | ^~~~~ > zip.c:112:8: error: packed attribute causes inefficient alignment for > 'compression' [-Werror=attributes] > 112 | __u16 compression; > | ^~~~~~~~~~~ > zip.c:113:8: error: packed attribute causes inefficient alignment for > 'last_modified_time' [-Werror=attributes] > 113 | __u16 last_modified_time; > | ^~~~~~~~~~~~~~~~~~ > zip.c:114:8: error: packed attribute causes inefficient alignment for > 'last_modified_date' [-Werror=attributes] > 114 | __u16 last_modified_date; > | ^~~~~~~~~~~~~~~~~~ > zip.c:118:8: error: packed attribute causes inefficient alignment for > 'file_name_length' [-Werror=attributes] > 118 | __u16 file_name_length; > | ^~~~~~~~~~~~~~~~ > zip.c:119:8: error: packed attribute causes inefficient alignment for > 'extra_field_length' [-Werror=attributes] > 119 | __u16 extra_field_length; > | ^~~~~~~~~~~~~~~~~~ > cc1: all warnings being treated as errors > > Build links, > https://storage.tuxsuite.com/public/linaro/lkft/builds/2MfXEyvgh4ba9y3rkt6KPf6sUMR/ > > > History link, > https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20230314/testrun/15564056/suite/build/test/gcc-10-lkftconfig-perf/history/ > > > -- > Linaro LKFT > https://lkft.linaro.org
