From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2BF303A451C; Mon, 16 Mar 2026 15:18:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773674283; cv=none; b=ACSOAWuBM0RTgU2P5lYcsj9enGSa39VkasNHcOlDI+pzxjG9Ib4LS1KfEAfT2iY43B4hPDeh/++Ls/2VroMWkv5/Z+PcdcQZ3i0ncIL6jvUtNJqCcfz8y4XtL4DMUXq8BxTwDF2T7YfW70XRrCSuNzRCKPqQwBVuFzF9cZLEV7E= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773674283; c=relaxed/simple; bh=UQ2FizDH/N8F9XjfQQCAOr3SnosbPEtZuV9pGho7oQs=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=GdE4dHqYGS31LULOtxIcYEPhnXm91iI5F9up/1MYlLlKdzC+EMbL1NiiLMupc17BzUY38OXgJ10jMMggOBahTiS2TYxD4TvTb7pz2HPaHZWHyeHkk7qElgTOsRxwbavHYJbs6A0mnVXOdDw5+67udmkEjc/0ntv1jpRPLZFkAsQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=R5Kodbfv; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="R5Kodbfv" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 43407C2BC87; Mon, 16 Mar 2026 15:17:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1773674283; bh=UQ2FizDH/N8F9XjfQQCAOr3SnosbPEtZuV9pGho7oQs=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=R5Kodbfv1XDDcrLoTnvBCdhSW+vqPhiyR7yfbF/NyilNtjFOHIl81gxZduBpbkYr4 c7pOz1yN6PBNfWrMTa+4gV+FB+AYty9w9sPn1/R6G84W7V7vh6eDGVmneKuZD1mh4p 0N/+up76bY07p1TRdupvfitbobBCNqCoZLEU/rPrsvX9f85pYU0aogDB6dqcFbp21s n2f3yKDZlwZ/EFaxHrTTDT3xDoVCytEizahCpIiwZhPreO6ZN0rurQEOXPaeIRJNoZ 9kq/pQWq3GAAnQTUcTVTHiBCi7d+ZaLPW7GH/ZUil1PJlRULUO4wBnkgMTx6BfNN/X UKGZO5YobrVCw== Message-ID: <49679362-a6b3-47ad-8fac-3126aae3dc07@kernel.org> Date: Mon, 16 Mar 2026 16:17:58 +0100 Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH net-next] net: page_pool: scale alloc cache with PAGE_SIZE To: Jakub Kicinski Cc: Nimrod Oren , Ilias Apalodimas , "David S. Miller" , Eric Dumazet , Paolo Abeni , Simon Horman , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Gal Pressman , Dragos Tatulea , Tariq Toukan References: <20260309081301.103152-1-noren@nvidia.com> <20260311175602.62629255@kernel.org> Content-Language: en-US From: Jesper Dangaard Brouer In-Reply-To: <20260311175602.62629255@kernel.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 12/03/2026 01.56, Jakub Kicinski wrote: > 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/ Sorry for the slow response, LGTM. Patch is already applied. --Jesper