netdev - Re: [PATCH] bpf: optimize constant blinding

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Message-ID: <CAADnVQLt7=9XQRccerLqHO8cdXTLy-uNBt-JOjbx=bAFouLf3Q@mail.gmail.com>
Date:   Mon, 17 Jun 2019 13:53:28 -0700
From:   Alexei Starovoitov <alexei.starovoitov@...il.com>
To:     Jiong Wang <jiong.wang@...ronome.com>
Cc:     Edward Cree <ecree@...arflare.com>,
        Alexei Starovoitov <ast@...nel.org>,
        Andrii Nakryiko <andriin@...com>,
        "Naveen N. Rao" <naveen.n.rao@...ux.vnet.ibm.com>,
        Daniel Borkmann <daniel@...earbox.net>,
        bpf <bpf@...r.kernel.org>,
        Network Development <netdev@...r.kernel.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        Jakub Kicinski <jakub.kicinski@...ronome.com>
Subject: Re: [PATCH] bpf: optimize constant blinding

On Mon, Jun 17, 2019 at 1:40 PM Jiong Wang <jiong.wang@...ronome.com> wrote:
>
> After digest Alexei and Andrii's reply, I still don't see the need to turn
> branch target into list, and I am not sure whether pool based list sound
> good? it saves size, resize pool doesn't invalid allocated node (the offset
> doesn't change) but requires one extra addition to calculate the pointer.

I don't think it worth to do a pool to accelerate kmalloc.
I doubt it will be faster either.