netdev - Re: [PATCH bpf-next] lib/Kconfig.debug: add prompt for kernel module BTF

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Date:   Wed, 9 Feb 2022 11:27:53 -0800
From:   Yonghong Song <yhs@...com>
To:     Connor O'Brien <connoro@...gle.com>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>
CC:     Martin KaFai Lau <kafai@...com>, Song Liu <songliubraving@...com>,
        John Fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...nel.org>, <netdev@...r.kernel.org>,
        <bpf@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH bpf-next] lib/Kconfig.debug: add prompt for kernel module
 BTF



On 2/8/22 9:21 PM, Connor O'Brien wrote:
> With DEBUG_INFO_BTF_MODULES enabled, a BTF mismatch between vmlinux
> and a separately-built module prevents the module from loading, even
> if the ABI is otherwise compatible and the module would otherwise load
> without issues. Currently this can be avoided only by disabling BTF
> entirely; disabling just module BTF would be sufficient but is not
> possible with the current Kconfig.
> 
> Add a prompt for DEBUG_INFO_BTF_MODULES to allow it to be disabled
> independently.
> 
> Signed-off-by: Connor O'Brien <connoro@...gle.com>

Acked-by: Yonghong Song <yhs@...com>