linux-kernel - Re: [PATCH net-next 2/2] net/mlx5e: Clamp page

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Message-ID: <20250923072356.7e6c234f@kernel.org>
Date: Tue, 23 Sep 2025 07:23:56 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: Tariq Toukan <tariqt@...dia.com>
Cc: Eric Dumazet <edumazet@...gle.com>, Paolo Abeni <pabeni@...hat.com>,
 Andrew Lunn <andrew+netdev@...n.ch>, "David S. Miller"
 <davem@...emloft.net>, Saeed Mahameed <saeedm@...dia.com>, "Mark Bloch"
 <mbloch@...dia.com>, Leon Romanovsky <leon@...nel.org>, "Jesper Dangaard
 Brouer" <hawk@...nel.org>, Ilias Apalodimas <ilias.apalodimas@...aro.org>,
 <netdev@...r.kernel.org>, <linux-rdma@...r.kernel.org>,
 <linux-kernel@...r.kernel.org>, Gal Pressman <gal@...dia.com>, Dragos
 Tatulea <dtatulea@...dia.com>
Subject: Re: [PATCH net-next 2/2] net/mlx5e: Clamp page_pool size to max

On Mon, 22 Sep 2025 12:18:35 +0300 Tariq Toukan wrote:
> When the user configures a large ring size (8K) and a large MTU (9000)
> in HW-GRO mode, the queue will fail to allocate due to the size of the
> page_pool going above the limit.

Please do some testing. A PP cache of 32k is just silly, you should
probably use a smaller limit.