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 07BDEFC0E; Wed, 28 May 2025 02:03:11 +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=1748397792; cv=none; b=kw5b8qE3Tn0aNcp7lPlW3tfkjfJQfpA7d0olpXVMam4s6ZzgiB3d5aBc3lxxk3kar0lbhWIgJArpT8nTegD7EeBpum3dcD1t3m2gXlV3TVTSx1HgHMU1B8cAbEFC8yuyvWeB6oveAQ49h80f0XzpxaLdLF4tNgOE/s98emIA1Io= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748397792; c=relaxed/simple; bh=4bNcE+GOAtdNFHh9ntSssHO+eAymso7Znpvgf96aQGY=; h=Date:From:To:Cc:Subject:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=L9lInRR2Hp2J5u2RFUKfNjZFhSd0/Eq6q71gasKNasSKT3fOaDarRh+Bh8xVMoadSTrHVbxcIo1f2YMmo8Bx2Ek+sltnRAsKKxsoUw6+tJAMEMpUZ8XRBtaBda+5+xUiQJXv9A/8o78dAkXwjjg7cNR+mCxNs3jP/+sJ8+BMWOw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=mQoOz927; 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="mQoOz927" Received: by smtp.kernel.org (Postfix) with ESMTPSA id ACA62C4CEE9; Wed, 28 May 2025 02:03:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1748397791; bh=4bNcE+GOAtdNFHh9ntSssHO+eAymso7Znpvgf96aQGY=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=mQoOz927XJBb7vAnobFLu30P8GTg7L69jJbi7Qv4YgAum6hsn65W3n4l2lNF6cHGb iNwycAL/06AFFtjWmE9r2rvoiHHqc0Ei25IjALsYxwFEhTawnG18P9AwT3hYohENhf WcFTp30zHKjkKSizstag88hrkwmWpnFHeKDKSwHYUPhC8369+ubKMsipHwpS4uWHBQ XZtWl+bP+Mi/GkgnFGJqtnUeIthcfTjgrjKm03UbAYZNRLkfrfapLQlQRNWeUXYU04 +ddSuW/knhCuxBjkGaJiXG+W+p9qTIH9UiKknUP39JyL/PrmjziMtf56x9exEGs2Dd KN3875FXKuatQ== Date: Tue, 27 May 2025 19:03:09 -0700 From: Jakub Kicinski To: Tony Nguyen Cc: davem@davemloft.net, pabeni@redhat.com, edumazet@google.com, andrew+netdev@lunn.ch, netdev@vger.kernel.org, Alexander Lobakin , maciej.fijalkowski@intel.com, magnus.karlsson@intel.com, michal.kubiak@intel.com, przemyslaw.kitszel@intel.com, ast@kernel.org, daniel@iogearbox.net, hawk@kernel.org, john.fastabend@gmail.com, horms@kernel.org, bpf@vger.kernel.org Subject: Re: [PATCH net-next 03/16] libeth: xdp: add XDP_TX buffers sending Message-ID: <20250527190309.156f3047@kernel.org> In-Reply-To: <20250520205920.2134829-4-anthony.l.nguyen@intel.com> References: <20250520205920.2134829-1-anthony.l.nguyen@intel.com> <20250520205920.2134829-4-anthony.l.nguyen@intel.com> Precedence: bulk X-Mailing-List: netdev@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 Tue, 20 May 2025 13:59:04 -0700 Tony Nguyen wrote: > + if (sinfo || !netmem_is_net_iov(netmem)) { > + const struct page_pool *pp = __netmem_get_pp(netmem); > + > + dma_sync_single_for_device(pp->p.dev, desc.addr, desc.len, > + DMA_BIDIRECTIONAL); > + } How can we get an unreadable netmem into the XDP Tx path?