netdev - Re: [PATCH net-next v3 0/4] eth: mlx4: use the page pool for Rx buffers

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Message-Id: 
 <173992203251.66396.7782136856830583801.git-patchwork-notify@kernel.org>
Date: Tue, 18 Feb 2025 23:40:32 +0000
From: patchwork-bot+netdevbpf@...nel.org
To: Jakub Kicinski <kuba@...nel.org>
Cc: davem@...emloft.net, tariqt@...dia.com, idosch@...sch.org,
 hawk@...nel.org, netdev@...r.kernel.org, edumazet@...gle.com,
 pabeni@...hat.com, andrew+netdev@...n.ch, horms@...nel.org
Subject: Re: [PATCH net-next v3 0/4] eth: mlx4: use the page pool for Rx buffers

Hello:

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

On Wed, 12 Feb 2025 17:06:31 -0800 you wrote:
> Convert mlx4 to page pool. I've been sitting on these patches for
> over a year, and Jonathan Lemon had a similar series years before.
> We never deployed it or sent upstream because it didn't really show
> much perf win under normal load (admittedly I think the real testing
> was done before Ilias's work on recycling).
> 
> During the v6.9 kernel rollout Meta's CDN team noticed that machines
> with CX3 Pro (mlx4) are prone to overloads (double digit % of CPU time
> spent mapping buffers in the IOMMU). The problem does not occur with
> modern NICs, so I dusted off this series and reportedly it still works.
> And it makes the problem go away, no overloads, perf back in line with
> older kernels. Something must have changed in IOMMU code, I guess.
> 
> [...]

Here is the summary with links:
  - [net-next,v3,1/4] eth: mlx4: create a page pool for Rx
    (no matching commit)
  - [net-next,v3,2/4] eth: mlx4: don't try to complete XDP frames in netpoll
    https://git.kernel.org/netdev/net-next/c/8fdeafd66eda
  - [net-next,v3,3/4] eth: mlx4: remove the local XDP fast-recycling ring
    (no matching commit)
  - [net-next,v3,4/4] eth: mlx4: use the page pool for Rx buffers
    (no matching commit)

You are awesome, thank you!
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