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From:   Puranjay Mohan <puranjay12@gmail.com>
Date:   Mon, 17 Jul 2023 09:50:56 +0200
Message-ID: <CANk7y0gTXPBj5U-vFK0cEvVe83tP1FqyD=MuLXT_amWO=EssOA@mail.gmail.com>
Subject: Re: [PATCH bpf-next v4 0/3] bpf, arm64: use BPF prog pack allocator
 in BPF JIT
To:     Mark Rutland <mark.rutland@arm.com>
Cc:     Daniel Borkmann <daniel@iogearbox.net>, ast@kernel.org,
        andrii@kernel.org, martin.lau@linux.dev, song@kernel.org,
        catalin.marinas@arm.com, bpf@vger.kernel.org, kpsingh@kernel.org,
        linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org
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Hi Mark,

On Mon, Jul 3, 2023 at 7:15=E2=80=AFPM Mark Rutland <mark.rutland@arm.com> =
wrote:
>
> On Mon, Jul 03, 2023 at 06:40:21PM +0200, Daniel Borkmann wrote:
> > Hi Mark,
>
> Hi Daniel,
>
> > On 6/26/23 10:58 AM, Puranjay Mohan wrote:
> > > BPF programs currently consume a page each on ARM64. For systems with=
 many BPF
> > > programs, this adds significant pressure to instruction TLB. High iTL=
B pressure
> > > usually causes slow down for the whole system.
> > >
> > > Song Liu introduced the BPF prog pack allocator[1] to mitigate the ab=
ove issue.
> > > It packs multiple BPF programs into a single huge page. It is current=
ly only
> > > enabled for the x86_64 BPF JIT.
> > >
> > > This patch series enables the BPF prog pack allocator for the ARM64 B=
PF JIT.
>
> > If you get a chance to take another look at the v4 changes from Puranja=
y and
> > in case they look good to you reply with an Ack, that would be great.
>
> Sure -- this is on my queue of things to look at; it might just take me a=
 few
> days to get the time to give this a proper look.
>
> Thanks,
> Mark.

I am eagerly looking forward to your feedback on this series.

Thanks,
Puranjay