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Thu, 19 Dec 2024 14:20:45 +0000 Message-ID: <0c349cfa-909f-4c91-90df-8e56d93a7ce1@intel.com> Date: Thu, 19 Dec 2024 15:20:06 +0100 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH net-next v1] net: stmmac: Drop useless code related to ethtool rx-copybreak To: Jakub Kicinski CC: Furong Xu <0x1207@gmail.com>, , , , , "Simon Horman" , Alexandre Torgue , Jose Abreu , Andrew Lunn , "David S. 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Perhaps you could reshuffle the struct a bit to avoid this. >> >> It's always good to inspect the .kos with pahole after modifying >> structures to make sure there are no regressions. > > Pretty off topic but I have a dumb question - how do you dump a struct > with pahole using debug info or BTF from a random .ko? > Ever since pahole got converted to BTF modules stopped working for me :S Hmm... I have this CONFIG_DEBUG_INFO=y # CONFIG_DEBUG_INFO_NONE is not set # CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT is not set # CONFIG_DEBUG_INFO_DWARF4 is not set CONFIG_DEBUG_INFO_DWARF5=y # CONFIG_DEBUG_INFO_REDUCED is not set # CONFIG_DEBUG_INFO_COMPRESSED_NONE is not set # CONFIG_DEBUG_INFO_COMPRESSED_ZLIB is not set CONFIG_DEBUG_INFO_COMPRESSED_ZSTD=y # CONFIG_DEBUG_INFO_SPLIT is not set CONFIG_DEBUG_INFO_BTF=y CONFIG_DEBUG_INFO_BTF_MODULES=y CONFIG_PAHOLE_VERSION=127 CONFIG_PAHOLE_HAS_SPLIT_BTF=y CONFIG_PAHOLE_HAS_BTF_TAG=y CONFIG_PAHOLE_HAS_LANG_EXCLUDE=y enabled in .config, then I just do $ pahole path/to/module.ko | less and search for the struct :D My pahole is korg Git HEAD. > I never cared enough to check as most interesting stuff is built-in > in Meta's kernels but it annoys me every now and then.. Thanks, Olek