Re: [PATCH bpf-next 00/18] bpf: Various x86-64 BPF JIT improvements

[patchwork-bot+netdevbpf@kernel.org]

Hello:

This series was applied to bpf/bpf-next.git (master)
by Kumar Kartikeya Dwivedi <memxor@gmail.com>:

On Tue, 13 Oct 2026 19:12:12 +0200 you wrote:
> This series changes the x86-64 BPF JIT to emit shorter and faster native
> code for the instruction patterns that LLVM-compiled programs hit in the
> real world. Every change stays within the lowering of a single BPF
> instruction, nothing is optimized across instructions. The patterns were
> checked against what clang's BPF backend actually emits, and the native
> forms follow what LLVM's own X86 backend picks for the same operations.
> 
> [...]

Here is the summary with links:
  - [bpf-next,01/18] bpf, x86: Drop redundant REX prefixes from zero and sign extensions
    https://git.kernel.org/bpf/bpf-next/c/63d4c99d25ae
  - [bpf-next,02/18] bpf, x86: Omit the displacement byte for zero offsets
    https://git.kernel.org/bpf/bpf-next/c/44df4d88aa63
  - [bpf-next,03/18] bpf, x86: Shorten the stack adjusts and the tail call counter loads
    https://git.kernel.org/bpf/bpf-next/c/c4da703867ed
  - [bpf-next,04/18] bpf, x86: Use shorter test and cmp encodings for immediates
    https://git.kernel.org/bpf/bpf-next/c/649caad437d7
  - [bpf-next,05/18] bpf, x86: Compare against 0, 127 and -128 with the adjusted condition
    https://git.kernel.org/bpf/bpf-next/c/fa6979fde9f6
  - [bpf-next,06/18] bpf, x86: Use movzx for byte and word masks and a not for xor with -1
    https://git.kernel.org/bpf/bpf-next/c/135b45cf05b9
  - [bpf-next,07/18] bpf, x86: Consolidate the ALU, shift and neg encodings into helpers
    https://git.kernel.org/bpf/bpf-next/c/707e1331f52b
  - [bpf-next,08/18] bpf, x86: Use shorter and faster forms for some ALU immediates
    https://git.kernel.org/bpf/bpf-next/c/d59f47e031ae
  - [bpf-next,09/18] bpf, x86: Swap 16-bit values with bswap and shr, not ror and movzx
    https://git.kernel.org/bpf/bpf-next/c/0847f6cb2e6a
  - [bpf-next,10/18] bpf, x86: Use BMI2 shifts also when the count is in rcx
    https://git.kernel.org/bpf/bpf-next/c/f2a5c00a80f1
  - [bpf-next,11/18] bpf, x86: Fold the PROBE_MEM address computation into a lea
    https://git.kernel.org/bpf/bpf-next/c/74309a9294a7
  - [bpf-next,12/18] bpf, x86: Compare the PROBE_MEM address range with a shift
    https://git.kernel.org/bpf/bpf-next/c/181576ebd87d
  - [bpf-next,13/18] bpf, x86: Divide by constants via multiplication with a magic number
    https://git.kernel.org/bpf/bpf-next/c/02cfd66f3d9a
  - [bpf-next,14/18] bpf, x86: Multiply by 3, 5 and 9 with lea
    https://git.kernel.org/bpf/bpf-next/c/36b383f5abc3
  - [bpf-next,15/18] bpf, x86: Use emit_sub_rsp() for the trampoline stack
    https://git.kernel.org/bpf/bpf-next/c/2378e471a6a2
  - [bpf-next,16/18] bpf, x86: Shorten the cast to a user address
    https://git.kernel.org/bpf/bpf-next/c/b878ba01b67a
  - [bpf-next,17/18] selftests/bpf: Add JIT instruction tests
    https://git.kernel.org/bpf/bpf-next/c/54e8bde13a3a
  - [bpf-next,18/18] selftests/bpf: Remove the old test_bpf module
    https://git.kernel.org/bpf/bpf-next/c/4532e525b286

You are awesome, thank you!
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