linux-kernel - Re: [PATCH bpf-next v3 0/3] bpf, arm64: use BPF prog pack allocator in BPF JIT

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Date:   Tue, 20 Jun 2023 23:40:32 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     Puranjay Mohan <puranjay12@...il.com>
Cc:     ast@...nel.org, daniel@...earbox.net, andrii@...nel.org,
        martin.lau@...ux.dev, song@...nel.org, catalin.marinas@....com,
        mark.rutland@....com, bpf@...r.kernel.org, kpsingh@...nel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH bpf-next v3 0/3] bpf,
 arm64: use BPF prog pack allocator in BPF JIT

Hello:

This series was applied to bpf/bpf-next.git (master)
by Alexei Starovoitov <ast@...nel.org>:

On Mon, 19 Jun 2023 10:01:18 +0000 you wrote:
> BPF programs currently consume a page each on ARM64. For systems with many BPF
> programs, this adds significant pressure to instruction TLB. High iTLB pressure
> usually causes slow down for the whole system.
> 
> Song Liu introduced the BPF prog pack allocator[1] to mitigate the above issue.
> It packs multiple BPF programs into a single huge page. It is currently only
> enabled for the x86_64 BPF JIT.
> 
> [...]

Here is the summary with links:
  - [bpf-next,v3,1/3] bpf: make bpf_prog_pack allocator portable
    https://git.kernel.org/bpf/bpf-next/c/9a44df2a4f2a
  - [bpf-next,v3,2/3] arm64: patching: Add aarch64_insn_copy()
    https://git.kernel.org/bpf/bpf-next/c/a7ed8ed92482
  - [bpf-next,v3,3/3] bpf, arm64: use bpf_jit_binary_pack_alloc
    https://git.kernel.org/bpf/bpf-next/c/49703aa2adfa

You are awesome, thank you!
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