linux-kernel - Re: [PATCH bpf-next] xsk: Simplify xp_aligned_validate

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Message-ID: <CAHApi-n9Vv-RvK-byG_hBiEqE+Apqb_Hvq-L1-yq3Q0LTtQDbQ@mail.gmail.com>
Date:   Wed, 12 Apr 2023 14:34:40 +0200
From:   Kal Cutter Conley <kal.conley@...tris.com>
To:     Magnus Karlsson <magnus.karlsson@...il.com>
Cc:     Björn Töpel <bjorn@...nel.org>,
        Magnus Karlsson <magnus.karlsson@...el.com>,
        Maciej Fijalkowski <maciej.fijalkowski@...el.com>,
        Jonathan Lemon <jonathan.lemon@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Jesper Dangaard Brouer <hawk@...nel.org>,
        John Fastabend <john.fastabend@...il.com>,
        netdev@...r.kernel.org, bpf@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH bpf-next] xsk: Simplify xp_aligned_validate_desc implementation

> > Perform the chunk boundary check like the page boundary check in
> > xp_desc_crosses_non_contig_pg(). This simplifies the implementation and
> > reduces the number of branches.
>
> Thanks for this simplification Kal. Just to check, does your change
> pass the xsk selftests, especially the INV_DESC test? If so, then you
> have my ack below.
>
> Acked-by: Magnus Karlsson <magnus.karlsson@...el.com>

Yes, I ran the XSK selftests and they all PASSED.