Re: [PATCH bpf-next v4 00/18] Raise BPF program stack size to 2KiB

[patchwork-bot+netdevbpf@kernel.org]

Hello:

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

On Thu, 24 Sep 2026 18:57:01 +0200 you wrote:
> BPF programs get 512 bytes of stack. This series raises that to 2 KiB
> on x86-64 and arm64. The budget covers a whole call chain, or each frame
> on a private stack, and a single function may use all of it. The
> interpreter, offloaded programs and the other JITs keep 512 bytes.
> 
> The x86-64 and arm64 JITs do not depend on 512-byte frames: both encode
> frame sizes in wide enough immediates, and on both a tail call pops the
> caller's frame and lands in the target's prologue before the target sets
> up its own.
> 
> [...]

Here is the summary with links:
  - [bpf-next,v4,01/18] bpf: Add accessors for verifier stack slots
    https://git.kernel.org/bpf/bpf-next/c/3b8da394c289
  - [bpf-next,v4,02/18] bpf: Widen the stack slot index in the jump history
    https://git.kernel.org/bpf/bpf-next/c/a9082d8a54c6
  - [bpf-next,v4,03/18] bpf: Store linked registers in the jump history as an array
    https://git.kernel.org/bpf/bpf-next/c/9eda94d7e898
  - [bpf-next,v4,04/18] bpf: Track backtracking stack slots with bitmaps
    https://git.kernel.org/bpf/bpf-next/c/765e7328d64d
  - [bpf-next,v4,05/18] bpf: Track scratched stack slots with a bitmap
    https://git.kernel.org/bpf/bpf-next/c/ec373f1f0788
  - [bpf-next,v4,06/18] bpf: Treat unknown-size stack reads as reaching the frame top
    https://git.kernel.org/bpf/bpf-next/c/1e054ab4aad6
  - [bpf-next,v4,07/18] bpf: Size liveness stack masks by the stack each frame uses
    https://git.kernel.org/bpf/bpf-next/c/481ceda77aeb
  - [bpf-next,v4,08/18] bpf: Grow the verifier id scratch on demand
    https://git.kernel.org/bpf/bpf-next/c/9f3d900a69be
  - [bpf-next,v4,09/18] selftests/bpf: Cover the tail call caller stack depth limit
    https://git.kernel.org/bpf/bpf-next/c/7fc140ba3dd9
  - [bpf-next,v4,10/18] selftests/bpf: Check that narrow stack stores define no slot
    https://git.kernel.org/bpf/bpf-next/c/76ab55b45244
  - [bpf-next,v4,11/18] selftests/bpf: Check liveness merge of masks with different widths
    https://git.kernel.org/bpf/bpf-next/c/10e9fa2b0b20
  - [bpf-next,v4,12/18] bpf: Size the per-frame verifier structures for a 2 KiB stack
    https://git.kernel.org/bpf/bpf-next/c/ecc441fc774e
  - [bpf-next,v4,13/18] bpf: Bound program stack use by a per-program limit
    https://git.kernel.org/bpf/bpf-next/c/9cfc28c9a8e6
  - [bpf-next,v4,14/18] selftests/bpf: Add load conditions on the program stack limit
    https://git.kernel.org/bpf/bpf-next/c/4fc52c1b549b
  - [bpf-next,v4,15/18] selftests/bpf: Give the 512-byte stack boundary tests a 2 KiB twin
    https://git.kernel.org/bpf/bpf-next/c/41fc2320aafe
  - [bpf-next,v4,16/18] bpf, x86: Allow programs 2 KiB of stack
    https://git.kernel.org/bpf/bpf-next/c/9f3bcf081ded
  - [bpf-next,v4,17/18] bpf, arm64: Allow programs 2 KiB of stack
    https://git.kernel.org/bpf/bpf-next/c/1d5306c11da2
  - [bpf-next,v4,18/18] selftests/bpf: Test the 2 KiB stack budget
    https://git.kernel.org/bpf/bpf-next/c/17d6fa978c00

You are awesome, thank you!
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