- Nov 21, 2022
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Nick Desaulniers authored
Make DEBUG_INFO_COMPRESSED a choice; DEBUG_INFO_COMPRESSED_NONE is the default, DEBUG_INFO_COMPRESSED_ZLIB uses zlib, DEBUG_INFO_COMPRESSED_ZSTD uses zstd. This renames the existing KConfig option DEBUG_INFO_COMPRESSED to DEBUG_INFO_COMPRESSED_ZLIB so users upgrading may need to reset the new Kconfigs. Some quick N=1 measurements with du, /usr/bin/time -v, and bloaty: clang-16, x86_64 defconfig plus CONFIG_DEBUG_INFO=y CONFIG_DEBUG_INFO_COMPRESSED_NONE=y: Elapsed (wall clock) time (h:mm:ss or m:ss): 0:55.43 488M vmlinux 27.6% 136Mi 0.0% 0 .debug_info 6.1% 30.2Mi 0.0% 0 .debug_str_offsets 3.5% 17.2Mi 0.0% 0 .debug_line 3.3% 16.3Mi 0.0% 0 .debug_loclists 0.9% 4.62Mi 0.0% 0 .debug_str clang-16, x86_64 defconfig plus CONFIG_DEBUG_INFO=y CONFIG_DEBUG_INFO_COMPRESSED_ZLIB=y: Elapsed (wall clock) time (h:mm:ss or m:ss): 1:00.35 385M vmlinux 21.8% 85.4Mi 0.0% 0 .debug_info 2.1% 8.26Mi 0.0% 0 .debug_str_offsets 2.1% 8.24Mi 0.0% 0 .debug_loclists 1.9% 7.48Mi 0.0% 0 .debug_line 0.5% 1.94Mi 0.0% 0 .debug_str clang-16, x86_64 defconfig plus CONFIG_DEBUG_INFO=y CONFIG_DEBUG_INFO_COMPRESSED_ZSTD=y: Elapsed (wall clock) time (h:mm:ss or m:ss): 0:59.69 373M vmlinux 21.4% 81.4Mi 0.0% 0 .debug_info 2.3% 8.85Mi 0.0% 0 .debug_loclists 1.5% 5.71Mi 0.0% 0 .debug_line 0.5% 1.95Mi 0.0% 0 .debug_str_offsets 0.4% 1.62Mi 0.0% 0 .debug_str That's only a 3.11% overall binary size savings over zlib, but at no performance regression. Link: https://maskray.me/blog/2022-09-09-zstd-compressed-debug-sections Link: https://maskray.me/blog/2022-01-23-compressed-debug-sections Suggested-by:
Sedat Dilek (DHL Supply Chain) <sedat.dilek@dhl.com> Reviewed-by:
Nathan Chancellor <nathan@kernel.org> Signed-off-by:
Nick Desaulniers <ndesaulniers@google.com> Signed-off-by:
Masahiro Yamada <masahiroy@kernel.org>
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- Sep 28, 2022
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Miguel Ojeda authored
Having most of the new files in place, we now enable Rust support in the build system, including `Kconfig` entries related to Rust, the Rust configuration printer and a few other bits. Reviewed-by:
Kees Cook <keescook@chromium.org> Reviewed-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org> Co-developed-by:
Alex Gaynor <alex.gaynor@gmail.com> Signed-off-by:
Finn Behrens <me@kloenk.de> Signed-off-by:
Adam Bratschi-Kaye <ark.email@gmail.com> Signed-off-by:
Wedson Almeida Filho <wedsonaf@google.com> Signed-off-by:
Michael Ellerman <mpe@ellerman.id.au> Signed-off-by:
Sven Van Asbroeck <thesven73@gmail.com> Signed-off-by:
Gary Guo <gary@garyguo.net> Signed-off-by:
Boris-Chengbiao Zhou <bobo1239@web.de> Signed-off-by:
Boqun Feng <boqun.feng@gmail.com> Signed-off-by:
Douglas Su <d0u9.su@outlook.com> Signed-off-by:
Dariusz Sosnowski <dsosnowski@dsosnowski.pl> Signed-off-by:
Antonio Terceiro <antonio.terceiro@linaro.org> Signed-off-by:
Daniel Xu <dxu@dxuuu.xyz> Signed-off-by:
Björn Roy Baron <bjorn3_gh@protonmail.com> Signed-off-by:
Martin Rodriguez Reboredo <yakoyoku@gmail.com> Signed-off-by:
Miguel Ojeda <ojeda@kernel.org>
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- Sep 24, 2022
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Nick Desaulniers authored
Alexey reported that the fraction of unknown filename instances in kallsyms grew from ~0.3% to ~10% recently; Bill and Greg tracked it down to assembler defined symbols, which regressed as a result of: commit b8a90923 ("Kbuild: do not emit debug info for assembly with LLVM_IAS=1") In that commit, I allude to restoring debug info for assembler defined symbols in a follow up patch, but it seems I forgot to do so in commit a66049e2 ("Kbuild: make DWARF version a choice") Link: https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=31bf18645d98b4d3d7357353be840e320649a67d Fixes: b8a90923 ("Kbuild: do not emit debug info for assembly with LLVM_IAS=1") Reported-by:
Alexey Alexandrov <aalexand@google.com> Reported-by:
Bill Wendling <morbo@google.com> Reported-by:
Greg Thelen <gthelen@google.com> Reviewed-by:
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Nick Desaulniers authored
Dmitrii, Fangrui, and Mashahiro note: Before GCC 11 and Clang 12 -gsplit-dwarf implicitly uses -g2. Fix CONFIG_DEBUG_INFO_SPLIT for gcc-11+ & clang-12+ which now need -g specified in order for -gsplit-dwarf to work at all. -gsplit-dwarf has been mutually exclusive with -g since support for CONFIG_DEBUG_INFO_SPLIT was introduced in commit 866ced95 ("kbuild: Support split debug info v4") I don't think it ever needed to be. Link: https://lore.kernel.org/lkml/20220815013317.26121-1-dmitrii.bundin.a@gmail.com/ Link: https://lore.kernel.org/lkml/CAK7LNARPAmsJD5XKAw7m_X2g7Fi-CAAsWDQiP7+ANBjkg7R7ng@mail.gmail.com/ Link: https://reviews.llvm.org/D80391 Cc: Andi Kleen <ak@linux.intel.com> Reported-by:
Dmitrii Bundin <dmitrii.bundin.a@gmail.com> Reported-by:
Fangrui Song <maskray@google.com> Reported-by:
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- Oct 24, 2021
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Masahiro Yamada authored
To slim down the top Makefile, split out the code block surrounded by ifdef CONFIG_DEBUG_INFO ... endif. Signed-off-by:
Nick Desaulniers <ndesauniers@google.com> Reviewed-by:
Sedat Dilek <sedat.dilek@gmail.com>
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