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Date: Wed, 11 Mar 2026 17:56:02 -0700
From: Jakub Kicinski <kuba@kernel.org>
To: Jesper Dangaard Brouer <hawk@kernel.org>
Cc: Nimrod Oren <noren@nvidia.com>, Ilias Apalodimas
 <ilias.apalodimas@linaro.org>, "David S. Miller" <davem@davemloft.net>,
 "Eric Dumazet" <edumazet@google.com>, Paolo Abeni <pabeni@redhat.com>,
 Simon Horman <horms@kernel.org>, <netdev@vger.kernel.org>,
 <linux-kernel@vger.kernel.org>, Gal Pressman <gal@nvidia.com>, Dragos
 Tatulea <dtatulea@nvidia.com>, Tariq Toukan <tariqt@nvidia.com>
Subject: Re: [PATCH net-next] net: page_pool: scale alloc cache with
 PAGE_SIZE
Message-ID: <20260311175602.62629255@kernel.org>
In-Reply-To: <20260309081301.103152-1-noren@nvidia.com>
References: <20260309081301.103152-1-noren@nvidia.com>
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On Mon, 9 Mar 2026 10:13:01 +0200 Nimrod Oren wrote:
> The current page_pool alloc-cache size and refill values were chosen to
> match the NAPI budget and to leave headroom for XDP_DROP recycling.
> These fixed values do not scale well with large pages,
> as they significantly increase a given page_pool's memory footprint.
> 
> Scale these values to better balance memory footprint across page sizes,
> while keeping behavior on 4KB-page systems unchanged.

Jesper WDYT? I'm of course happy with this simple approach.
https://lore.kernel.org/all/20260309081301.103152-1-noren@nvidia.com/