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 E623137CD3C; Sun, 12 Apr 2026 19:59:20 +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=1776023961; cv=none; b=RVmC9lQRbqqRlB7mPyb8h3YM+obPh+lkiQG4M1LyG4IVqOG2xSdk6k0c+8Bx8J07MOcwybyDTahw7lrZBzpDUY1SaKUBymwbG61NR+qNCyXX+i8jL08a1EYEJGOzdcMv5ZIOrjYiqZzJ0w+XnauNkzZfoLRt+9kpSNZSW5kCKvs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776023961; c=relaxed/simple; bh=5JFGMjojVLjVjBuXH5cwllbciCfN+kWLL0KPdVKa2C8=; h=Date:From:To:Cc:Subject:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=SEklIZKgYitKGQ1QE/TNz/xIuSut2rEnJnWfG8e+9nUZbVNCLdzgy43XSlFFMq0m0HgQBSzbqbFrbT1Xtyw1QjAJN/rQrEFzdEUJOvYyhnItFN9IjMq/rxPUKdLYFANWbKmab2RRyo4qbd+/xTvPypfgHjPm1GvsYVjSuw1+VjU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=SJK2fyDo; 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="SJK2fyDo" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D7F10C19424; Sun, 12 Apr 2026 19:59:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1776023960; bh=5JFGMjojVLjVjBuXH5cwllbciCfN+kWLL0KPdVKa2C8=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=SJK2fyDoSooRHzLNt5CadoC2V/OLevsHmQiX/kwT/hgDiCMZW47r0vtntQ5y5dPsX FUAjq5nH42WG1qkmVtNMKRCGqTlM5d8iDQIQFaQ/13fh+wMVHAggqU8y3hvTkcBe3n uYg3WHRpNVBKr/cr9eSeX82hsA78TSYOXNLfcLoekJFloux2HRtLUM7Cf8xjSuvWIF v8lsRzCaMsab/lUygANYwMTUqb9Bt5I7kQEuH7dq9TmnN2x+AMIfUWxl2IzcjHRi5G LPAfcQhTkXsAd0KJcx5+qEXaSEsnlBJJYK79GEqu0WJo6skejxRwcSOkzeLiFdvGB+ XX8BuDDmOFIwQ== Date: Sun, 12 Apr 2026 12:59:17 -0700 From: Jakub Kicinski To: Dipayaan Roy Cc: kys@microsoft.com, haiyangz@microsoft.com, wei.liu@kernel.org, decui@microsoft.com, andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@google.com, pabeni@redhat.com, leon@kernel.org, longli@microsoft.com, kotaranov@microsoft.com, horms@kernel.org, shradhagupta@linux.microsoft.com, ssengar@linux.microsoft.com, ernis@linux.microsoft.com, shirazsaleem@microsoft.com, linux-hyperv@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, stephen@networkplumber.org, jacob.e.keller@intel.com, leitao@debian.org, kees@kernel.org, john.fastabend@gmail.com, hawk@kernel.org, bpf@vger.kernel.org, daniel@iogearbox.net, ast@kernel.org, sdf@fomichev.me, dipayanroy@microsoft.com Subject: Re: [PATCH net-next v6 0/2] net: mana: add ethtool private flag for full-page RX buffers Message-ID: <20260412125917.4fa8fc8d@kernel.org> In-Reply-To: <20260409183509.0b24dea6@kernel.org> References: <20260407200216.272659-1-dipayanroy@linux.microsoft.com> <20260409183509.0b24dea6@kernel.org> Precedence: bulk X-Mailing-List: linux-rdma@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit On Thu, 9 Apr 2026 18:35:09 -0700 Jakub Kicinski wrote: > On Tue, 7 Apr 2026 12:59:17 -0700 Dipayaan Roy wrote: > > This behavior is observed on a single platform; other platforms > > perform better with page_pool fragments, indicating this is not a > > page_pool issue but platform-specific. > > Well, someone has to run some experiments and confirm other ARM > platforms are not impacted, with data. I was hoping to do it myself > but doesn't look like that will happen in time for the merge window :( Please repost with the perf analysis on other commercially available ARM platform. Something like: This is a workaround applicable to only some platforms. Modifying driver X to use a similar workaround on [Ampere Max|nVidia Grace|Amazon Graviton 3|..] the performance for split pages is y% higher than when using single pages. -- pw-bot: cr