netdev - Re: [PATCH riscv-next] riscv: bpf: Fix eBPF's exception tables

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Message-ID: <mhng-db82dcc8-e5f7-4da5-9f5c-d7f6eb225735@palmer-ri-x1c9>
Date:   Wed, 19 Jan 2022 10:04:24 -0800 (PST)
From:   Palmer Dabbelt <palmer@...osinc.com>
To:     Bjorn Topel <bjorn.topel@...il.com>
CC:     daniel@...earbox.net, jszhang@...nel.org,
        Paul Walmsley <paul.walmsley@...ive.com>,
        aou@...s.berkeley.edu, ast@...nel.org, andrii@...nel.org,
        kafai@...com, songliubraving@...com, yhs@...com,
        john.fastabend@...il.com, kpsingh@...nel.org,
        netdev@...r.kernel.org, bpf@...r.kernel.org,
        linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
        tongtiangen@...wei.com
Subject:     Re: [PATCH riscv-next] riscv: bpf: Fix eBPF's exception tables

On Wed, 19 Jan 2022 07:59:40 PST (-0800), Bjorn Topel wrote:
> On Wed, 19 Jan 2022 at 16:42, Daniel Borkmann <daniel@...earbox.net> wrote:
>>
> [...]
>> > AFAIK, Jisheng's extable work is still in Palmer's for-next tree.
>> >
>> > Daniel/Alexei: This eBPF must follow commit 1f77ed9422cb ("riscv:
>> > switch to relative extable and other improvements"), which is in
>> > Palmer's tree. It cannot go via bpf-next.
>>
>> Thanks for letting us know, then lets route this fix via Palmer. Maybe he could
>> also add Fixes tags when applying, so stable can pick it up later on.
>>
>
> It shouldn't have a fixes-tag, since it's a new feature for RV. This
> was adapting to that new feature. It hasn't made it upstream yet (I
> hope!).

That was actually just merged this morning into Linus' tree.  I'm still 
happy to take the fix via my tree, but you're welcome to take it via a 
BPF tree as well.  I'm juggling some other patches right now, just LMK 
what works on your end.

IMO it should have a fixes tag: it's a bit of a grey area, but one 
something's in I generally try and put those tags on it.  That way folks 
who try and backport features at least have a shot at finding the fix 
(or at least, finding the fix without chasing around the bug ;)).

I also tried poking you guys on the BPF Slack, but I don't really use it 
and I'm not sure if anyone else does either.