Re: [PATCHv5 bpf-next 0/5] libbpf: Make optimized uprobes backward compatible

[patchwork-bot+netdevbpf@kernel.org]

Hello:

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

On Tue, 24 Feb 2026 11:39:10 +0100 you wrote:
> hi,
> we can currently optimize uprobes on top of nop5 instructions,
> so application can define USDT_NOP to nop5 and use USDT macro
> to define optimized usdt probes.
> 
> This works fine on new kernels, but could have performance penalty
> on older kernels, that do not have the support to optimize and to
> emulate nop5 instruction.
> 
> [...]

Here is the summary with links:
  - [PATCHv5,bpf-next,1/5] libbpf: Add uprobe syscall feature detection
    https://git.kernel.org/bpf/bpf-next/c/05738da0efa1
  - [PATCHv5,bpf-next,2/5] libbpf: Add support to detect nop,nop5 instructions combo for usdt probe
    https://git.kernel.org/bpf/bpf-next/c/41a5c7df4466
  - [PATCHv5,bpf-next,3/5] selftests/bpf: Emit nop,nop5 instructions combo for x86_64 arch
    https://git.kernel.org/bpf/bpf-next/c/0c178e9debc8
  - [PATCHv5,bpf-next,4/5] selftests/bpf: Add test for checking correct nop of optimized usdt
    https://git.kernel.org/bpf/bpf-next/c/304841967c55
  - [PATCHv5,bpf-next,5/5] selftests/bpf: Add usdt trigger bench
    https://git.kernel.org/bpf/bpf-next/c/0c4fc6bd6105

You are awesome, thank you!
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