linux-kernel - Re: [PATCH v4 bpf-next 3/5] kbuild: build kernel module BTFs if BTF is enabled and pahole supports it

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Date:   Wed, 11 Nov 2020 01:04:53 +0000
From:   Song Liu <songliubraving@...com>
To:     Andrii Nakryiko <andrii@...nel.org>
CC:     bpf <bpf@...r.kernel.org>, Networking <netdev@...r.kernel.org>,
        "Alexei Starovoitov" <ast@...com>,
        Daniel Borkmann <daniel@...earbox.net>,
        Kernel Team <Kernel-team@...com>,
        open list <linux-kernel@...r.kernel.org>,
        "rafael@...nel.org" <rafael@...nel.org>,
        "jeyu@...nel.org" <jeyu@...nel.org>,
        Arnaldo Carvalho de Melo <acme@...hat.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>
Subject: Re: [PATCH v4 bpf-next 3/5] kbuild: build kernel module BTFs if BTF
 is enabled and pahole supports it



> On Nov 9, 2020, at 5:19 PM, Andrii Nakryiko <andrii@...nel.org> wrote:

[...]

> SPLIT BTF
> =========
> 
> $ for f in $(find . -name '*.ko'); do size -A -d $f | grep BTF | awk '{print $2}'; done | awk '{ s += $1 } END { print s }'
> 5194047
> 
> $ for f in $(find . -name '*.ko'); do printf "%s %d\n" $f $(size -A -d $f | grep BTF | awk '{print $2}'); done | sort -nr -k2 | head -n10
> ./drivers/gpu/drm/i915/i915.ko 293206
> ./drivers/gpu/drm/radeon/radeon.ko 282103
> ./fs/xfs/xfs.ko 222150
> ./drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.ko 198503
> ./drivers/infiniband/hw/mlx5/mlx5_ib.ko 198356
> ./drivers/net/ethernet/broadcom/bnx2x/bnx2x.ko 113444
> ./fs/cifs/cifs.ko 109379
> ./arch/x86/kvm/kvm.ko 100225
> ./drivers/gpu/drm/drm.ko 94827
> ./drivers/infiniband/core/ib_core.ko 91188
> 
> Cc: Masahiro Yamada <yamada.masahiro@...ionext.com>
> Signed-off-by: Andrii Nakryiko <andrii@...nel.org>

Acked-by: Song Liu <songliubraving@...com>