netdev - Re: [RFC bpf-next 0/2] bpf: Fix BTF data for modules

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Message-ID: <878rtz84ol.fsf@oc8242746057.ibm.com>
Date:   Fri, 25 Feb 2022 14:19:06 +0100
From:   Alexander Egorenkov <egorenar@...ux.ibm.com>
To:     jolsa@...hat.com
Cc:     andrii.nakryiko@...il.com, andrii@...nel.org, ast@...nel.org,
        bpf@...r.kernel.org, daniel@...earbox.net,
        john.fastabend@...il.com, kafai@...com, kpsingh@...omium.org,
        netdev@...r.kernel.org, songliubraving@...com, yhs@...com
Subject: Re: [RFC bpf-next 0/2] bpf: Fix BTF data for modules

Hi Jiri and Andrii,

we also have discovered this problem recently on Fedora 35 and linux-next.
Is there any status update here ?

@Jiri
Is the increase of total kernel modules size by 20MB really a big deal
on s390x ? We would like to have it enabled on our architecture
again ;-) And 20MB seems okay or am i missing something maybe ?

Another question i have wrt to BTF is why is it necessary to have e.g.
_struct module_ be present within kernel module BTF if it is already
present within vmlinux's one ? Can't the one from vmlinux be reused for
kernel modules as well, they should be identical, right ?

Thanks
Regards
Alex