linux-kernel - Re: [PATCH net v1] net: stmmac: Apply new page pool parameters when SPH is enabled

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Message-Id: 
 <173924043750.3915440.1883546430698083121.git-patchwork-notify@kernel.org>
Date: Tue, 11 Feb 2025 02:20:37 +0000
From: patchwork-bot+netdevbpf@...nel.org
To: Furong Xu <0x1207@...il.com>
Cc: netdev@...r.kernel.org, linux-stm32@...md-mailman.stormreply.com,
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
 andrew+netdev@...n.ch, davem@...emloft.net, edumazet@...gle.com,
 kuba@...nel.org, pabeni@...hat.com, mcoquelin.stm32@...il.com,
 alexandre.torgue@...s.st.com, xfr@...look.com, jonathanh@...dia.com,
 bgriffis@...dia.com, idosch@...sch.org
Subject: Re: [PATCH net v1] net: stmmac: Apply new page pool parameters when SPH
 is enabled

Hello:

This patch was applied to netdev/net.git (main)
by Jakub Kicinski <kuba@...nel.org>:

On Fri,  7 Feb 2025 16:56:39 +0800 you wrote:
> Commit df542f669307 ("net: stmmac: Switch to zero-copy in
> non-XDP RX path") makes DMA write received frame into buffer at offset
> of NET_SKB_PAD and sets page pool parameters to sync from offset of
> NET_SKB_PAD. But when Header Payload Split is enabled, the header is
> written at offset of NET_SKB_PAD, while the payload is written at
> offset of zero. Uncorrect offset parameter for the payload breaks dma
> coherence [1] since both CPU and DMA touch the page buffer from offset
> of zero which is not handled by the page pool sync parameter.
> 
> [...]

Here is the summary with links:
  - [net,v1] net: stmmac: Apply new page pool parameters when SPH is enabled
    https://git.kernel.org/netdev/net/c/cb6cc8ed7717

You are awesome, thank you!
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