On 2023-03-28 16:52, Arnaldo Carvalho de Melo wrote: > Em Tue, Mar 28, 2023 at 01:33:29PM +0300, Eduard Zingerman escreveu: > > On Sat, 2023-03-25 at 20:42 +0900, Masahiro Yamada wrote: > > [...] > > > > Strange. > > > > > > > > I used the .config file Aurelien provided, but > > > > I still cannot reproduce this issue. > > > > > > > > The vmlinux size is small as-is in the current mainline. > > > > > > > > [mainline] > > > > > > > > masahiro@zoe:~/ref/linux(master)$ git log --oneline -1 > > > > 65aca32efdcb (HEAD -> master, origin/master, origin/HEAD) Merge tag > > > > 'mm-hotfixes-stable-2023-03-24-17-09' of > > > > git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm > > > > masahiro@zoe:~/ref/linux(master)$ aarch64-linux-gnu-size vmlinux > > > > text data bss dec hex filename > > > > 24561282 8186912 622032 33370226 1fd3072 vmlinux > > > > masahiro@zoe:~/ref/linux(master)$ aarch64-linux-gnu-readelf -S > > > > vmlinux | grep -A1 BTF > > > > [15] .BTF PROGBITS ffff8000091c0708 011d0708 > > > > 000000000048209c 0000000000000000 A 0 0 1 > > > > [16] .BTF_ids PROGBITS ffff8000096427a4 016527a4 > > > > 0000000000000a1c 0000000000000000 A 0 0 1 > > > > > > > > [mainline + revert 994b7ac] > > > > > > > > masahiro@zoe:~/ref/linux2(testing)$ git log --oneline -2 > > > > 856c80dd789c (HEAD -> testing) Revert "arm64: remove special treatment > > > > for the link order of head.o" > > > > 65aca32efdcb (origin/master, origin/HEAD, master) Merge tag > > > > 'mm-hotfixes-stable-2023-03-24-17-09' of > > > > git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm > > > > masahiro@zoe:~/ref/linux2(testing)$ aarch64-linux-gnu-size vmlinux > > > > text data bss dec hex filename > > > > 24561329 8186912 622032 33370273 1fd30a1 vmlinux > > > > masahiro@zoe:~/ref/linux2(testing)$ aarch64-linux-gnu-readelf -S > > > > vmlinux | grep -A1 BTF > > > > [15] .BTF PROGBITS ffff8000091c0708 011d0708 > > > > 00000000004820cb 0000000000000000 A 0 0 1 > > > > [16] .BTF_ids PROGBITS ffff8000096427d4 016527d4 > > > > 0000000000000a1c 0000000000000000 A 0 0 1 > > > > > > > > > > > > > > > > I still do not know what affects reproducibility. > > > > (compiler version, pahole version, etc. ?) > > > > > > > > > > > > > > > > > > > > Aurelien used GCC 12 + binutils 2.40, but > > > > my toolchain is a bit older. > > > > > > > > FWIW, I tested this on Ubuntu 22.04LTS. > > > > > > > > masahiro@zoe:~/ref/linux(master)$ aarch64-linux-gnu-gcc --version > > > > aarch64-linux-gnu-gcc (Ubuntu 11.3.0-1ubuntu1~22.04) 11.3.0 > > > > Copyright (C) 2021 Free Software Foundation, Inc. > > > > This is free software; see the source for copying conditions. There is NO > > > > warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. > > > > > > > > masahiro@zoe:~/ref/linux(master)$ pahole --version > > > > v1.22 > > > > > > > > masahiro@zoe:~/ref/linux(master)$ aarch64-linux-gnu-as --version > > > > GNU assembler (GNU Binutils for Ubuntu) 2.38 > > > > Copyright (C) 2022 Free Software Foundation, Inc. > > > > This program is free software; you may redistribute it under the terms of > > > > the GNU General Public License version 3 or later. > > > > This program has absolutely no warranty. > > > > This assembler was configured for a target of `aarch64-linux-gnu'. > > > > > > I did the same things in Deiban sid > > > in order to use newer versions of tools. > > > > > > Hi Masahiro, > > > > An upgrade from gcc 11 to gcc 12, BTF section increase and a number of > > duplicate IDs reported by resolve_btfids matches the description of > > the following thread: > > > > https://lore.kernel.org/bpf/Y%2FP1yxAuV6Wj3A0K@xxxxxxxxxx/ > > > > The issue is caused by change in GNU assembler DWARF generation. > > I've sent a patch to fix it a few weeks ago and it is merged in > > dwarves master: > > > > a9498899109d ("dwarf_loader: Fix for BTF id drift caused by adding unspecified types") > > > > Could you please grab a fresh version of dwarves from: > > > > git@xxxxxxxxxx:acmel/dwarves.git > > > > compile 'pahole' and try with? > > pahole 1.25 is long overdue, so let see if this got fixed with what is > in master, please take a look, you can as well get it from: > > git://git.kernel.org/pub/scm/devel/pahole/pahole.git > pahole 1.25 has been released, so I have tried a kernel build with it, and I confirm it fixes the issue. Thanks for the help. Aurelien -- Aurelien Jarno GPG: 4096R/1DDD8C9B aurelien@xxxxxxxxxxx http://aurel32.net
