netdev - Re: [PATCH bpf] cpumap: disable page_pool direct xdp

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Message-Id: 
 <175523340651.927837.5280126542856100609.git-patchwork-notify@kernel.org>
Date: Fri, 15 Aug 2025 04:50:06 +0000
From: patchwork-bot+netdevbpf@...nel.org
To: Jesper Dangaard Brouer <hawk@...nel.org>
Cc: bpf@...r.kernel.org, kuba@...nel.org, dtatulea@...dia.com, ast@...nel.org,
 borkmann@...earbox.net, netdev@...r.kernel.org, eric.dumazet@...il.com,
 davem@...emloft.net, pabeni@...hat.com, tariqt@...dia.com, memxor@...il.com,
 john.fastabend@...il.com, kernel-team@...udflare.com, yan@...udflare.com,
 jbrandeburg@...udflare.com, carges@...udflare.com, arzeznik@...udflare.com
Subject: Re: [PATCH bpf] cpumap: disable page_pool direct xdp_return need
 larger
 scope

Hello:

This patch was applied to bpf/bpf.git (master)
by Martin KaFai Lau <martin.lau@...nel.org>:

On Thu, 14 Aug 2025 20:24:37 +0200 you wrote:
> When running an XDP bpf_prog on the remote CPU in cpumap code
> then we must disable the direct return optimization that
> xdp_return can perform for mem_type page_pool.  This optimization
> assumes code is still executing under RX-NAPI of the original
> receiving CPU, which isn't true on this remote CPU.
> 
> The cpumap code already disabled this via helpers
> xdp_set_return_frame_no_direct() and xdp_clear_return_frame_no_direct(),
> but the scope didn't include xdp_do_flush().
> 
> [...]

Here is the summary with links:
  - [bpf] cpumap: disable page_pool direct xdp_return need larger scope
    https://git.kernel.org/bpf/bpf/c/7572a47ebcdf

You are awesome, thank you!
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