From: Jakub Kicinski <kuba@kernel.org>
To: Ido Schimmel <idosch@idosch.org>
Cc: davem@davemloft.net, netdev@vger.kernel.org, edumazet@google.com,
pabeni@redhat.com, andrew+netdev@lunn.ch, horms@kernel.org,
tariqt@nvidia.com, hawk@kernel.org
Subject: Re: [PATCH net-next 4/4] eth: mlx4: use the page pool for Rx buffers
Date: Wed, 5 Feb 2025 11:11:00 -0800 [thread overview]
Message-ID: <20250205111100.4ba5b56f@kernel.org> (raw)
In-Reply-To: <Z6OoZwJ-REpisYb6@shredder>
On Wed, 5 Feb 2025 20:05:27 +0200 Ido Schimmel wrote:
> On Tue, Feb 04, 2025 at 07:12:13PM -0800, Jakub Kicinski wrote:
> > @@ -283,6 +265,7 @@ int mlx4_en_create_rx_ring(struct mlx4_en_priv *priv,
> > pp.netdev = priv->dev;
> > pp.dev = &mdev->dev->persist->pdev->dev;
> > pp.dma_dir = DMA_BIDIRECTIONAL;
> > + pp.max_len = PAGE_SIZE;
>
> Possibly a stupid question, but can you explain this hunk given patch #1
> does not set 'PP_FLAG_DMA_SYNC_DEV' ?
Not sure, I wrote this a while back, I probably left this here
"for future self", when sync support is added. To remember that
since we still do the page flipping thing we must sync the entire
page, even if MTU is smaller. It's a common source of bugs.
next prev parent reply other threads:[~2025-02-05 19:11 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-02-05 3:12 [PATCH net-next 0/4] eth: mlx4: use the page pool for Rx buffers Jakub Kicinski
2025-02-05 3:12 ` [PATCH net-next 1/4] eth: mlx4: create a page pool for Rx Jakub Kicinski
2025-02-06 19:44 ` Tariq Toukan
2025-02-06 23:04 ` Jakub Kicinski
2025-02-11 18:01 ` Tariq Toukan
2025-02-11 19:06 ` Jakub Kicinski
2025-02-11 19:11 ` Tariq Toukan
2025-02-11 19:21 ` Tariq Toukan
2025-02-11 19:23 ` Jakub Kicinski
2025-02-11 19:38 ` Tariq Toukan
2025-02-11 19:18 ` Tariq Toukan
2025-02-11 19:44 ` Jakub Kicinski
2025-02-05 3:12 ` [PATCH net-next 2/4] eth: mlx4: don't try to complete XDP frames in netpoll Jakub Kicinski
2025-02-06 19:50 ` Tariq Toukan
2025-02-06 23:05 ` Jakub Kicinski
2025-02-05 3:12 ` [PATCH net-next 3/4] eth: mlx4: remove the local XDP fast-recycling ring Jakub Kicinski
2025-02-05 3:12 ` [PATCH net-next 4/4] eth: mlx4: use the page pool for Rx buffers Jakub Kicinski
2025-02-05 18:05 ` Ido Schimmel
2025-02-05 19:11 ` Jakub Kicinski [this message]
2025-02-06 12:57 ` [PATCH net-next 0/4] " Tariq Toukan
2025-02-06 15:58 ` Jakub Kicinski
2025-02-11 18:05 ` Tariq Toukan
2025-02-11 18:50 ` Jakub Kicinski
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