From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pl1-f172.google.com (mail-pl1-f172.google.com [209.85.214.172]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E5A6320330 for ; Thu, 23 Jan 2025 02:47:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.172 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1737600452; cv=none; b=QE6yINhtW3r4pFbdwkf0W8udH8CFpdUF6WCXTp9iIsPwZv/+ywCzdY7YQyWm6y47mp7+0Mm60OeFYZZEjxR7MotrG9yfIdWogBuYz85o4ZY8w+KvW0hmweQHQXPLmsOtY1bMwmKVqaRC0RSnVZ5fowR7mpOylrGTz199T5EYY1Y= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1737600452; c=relaxed/simple; bh=qpz5GHIV/q1Z6mS3ehwKqxMZzFsWsx5+0NpTvYpIx3c=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=pAHsbvSMOHDdZv8MdGfmdK59STioRgcwTQiGFZEedT3bH6LoI2ipI/sS7q7GB9NOOcjmd7k0KQvz+OWnMl5rfzLb2FNlvlIK3uHppUiUB4+BoLeeMlXPCA4wEmtRtrh8JHCCTmjpy7D9BWAQcbNXYR9INiw28b/B1L9rzhIeUXI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=fastly.com; spf=pass smtp.mailfrom=fastly.com; dkim=pass (1024-bit key) header.d=fastly.com header.i=@fastly.com header.b=dJqFsFVm; arc=none smtp.client-ip=209.85.214.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=fastly.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=fastly.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=fastly.com header.i=@fastly.com header.b="dJqFsFVm" Received: by mail-pl1-f172.google.com with SMTP id d9443c01a7336-21661be2c2dso5945735ad.1 for ; Wed, 22 Jan 2025 18:47:30 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=fastly.com; s=google; t=1737600450; x=1738205250; darn=vger.kernel.org; h=in-reply-to:content-transfer-encoding:content-disposition :mime-version:references:mail-followup-to:message-id:subject:cc:to :from:date:from:to:cc:subject:date:message-id:reply-to; bh=A2UgsPHwIKBOqMrfozZVw3t3KHtftNFDPhqp8M0WAbQ=; b=dJqFsFVmbHUevobE6/TzgF6tALw6Q/7oDf32v58DT3qwItRBAstwqqDZXyh+/xECv1 TdWPmVLfaeIFBAJnVFxRVo0gN1u4LG+gLNKkZdOMS0uUHfse8Tc/R+7XW1Hr0PTK4P49 /5tHTmuQlj4olEG1mlR4VogDjwDAGU5T++aQE= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1737600450; x=1738205250; h=in-reply-to:content-transfer-encoding:content-disposition :mime-version:references:mail-followup-to:message-id:subject:cc:to :from:date:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=A2UgsPHwIKBOqMrfozZVw3t3KHtftNFDPhqp8M0WAbQ=; b=YQ9ZmtIqOf8kf+vAed7uaZSnCuzSpT0p4P+MfU9A2/iBpare494g5KG8heOdx+HCQC SMSXuPvg67D5WWqwCTRxgL4p4+KNguqD3ojr2vRLSCaR8/x8w4IHLwGIEgFqYx3erFDk VyksZachHDubTDQ+C6KVObDMMdc/xND4Fu5hBY5QX19UU5M4cVb44LaH8+FEw4hQ5ZxA kPwfzjEnOHWXo3Bx6zWSo64uzqixqmg4HfqK13gxvgmrQtqGc/alt73Vhhma+/1N/XOZ AEhPqqhPkqUcIKmDcyx4ALlDrvx8XBpx10q48BYKitPUzdTB8FEdDgDElJjgFGMY29oe vyfA== X-Forwarded-Encrypted: i=1; AJvYcCU13BBwPqFoEU111qV+HOvk1XJTp+g37elgCnXB86WUIecWHjrR+r4z44mA6CSBIxk6YlKe9tgLmXZsmZI=@vger.kernel.org X-Gm-Message-State: AOJu0YzHJxU1VWtrL9I1uI3hMBjiU7RWBr/VTssOI/5P6RV17y9dhlNC lcTp/DGHdrH8hMXu/ECAvfTL1VB7rhwkj639BrmBt63wV33oQNj7MpEG2221Xdk= X-Gm-Gg: ASbGnctifpF5LZDTeNfRe1edOe55PXk6kvoejU4GkFVb+a5HCd8/WM0C/b7CmootvrG 8UxO8Zf3IIJtRwtvGlZLQLAUzsb80i2xd8PPNGwrU0xWMricbGD+o8xtsL4uraOAOi0D38uF0kg O6HSGLUh7iH4Dl0Yx9EXa113NAcGXNWCCQVVCtm3yyb4YBAoFX7j2SRmkpOHO844cBY/UFJ12jB gXuCGLUc2zTATtqgkX3x4mtjDXf385Dpnj+n6wac1jFdNhu+yRROKM/ZbwnxCWj/e5KJSgs92ye +0NYnck9TrdZ9PxYhUQYdFb5wUsFck8mZsTLG7bCtVrvnruF5TU4XtPitg== X-Google-Smtp-Source: AGHT+IFJpJzS0Tmwz6QJjW16olbKOsy6uoF4TTmtdWvfMVbO5XC6LPMoIN8L//vAPXE/Dy/lO1nFLA== X-Received: by 2002:a17:902:e5ca:b0:215:b473:1dc9 with SMTP id d9443c01a7336-21c355fa313mr312106225ad.46.1737600450217; Wed, 22 Jan 2025 18:47:30 -0800 (PST) Received: from LQ3V64L9R2 (c-24-6-151-244.hsd1.ca.comcast.net. [24.6.151.244]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-a9bce3a7eedsm11353188a12.40.2025.01.22.18.47.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 22 Jan 2025 18:47:29 -0800 (PST) Date: Wed, 22 Jan 2025 18:47:25 -0800 From: Joe Damato To: Jason Wang Cc: netdev@vger.kernel.org, gerhard@engleder-embedded.com, leiyang@redhat.com, xuanzhuo@linux.alibaba.com, mkarsten@uwaterloo.ca, "Michael S. Tsirkin" , Eugenio =?iso-8859-1?Q?P=E9rez?= , Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , "open list:VIRTIO CORE AND NET DRIVERS" , open list Subject: Re: [RFC net-next v3 2/4] virtio_net: Prepare for NAPI to queue mapping Message-ID: Mail-Followup-To: Joe Damato , Jason Wang , netdev@vger.kernel.org, gerhard@engleder-embedded.com, leiyang@redhat.com, xuanzhuo@linux.alibaba.com, mkarsten@uwaterloo.ca, "Michael S. Tsirkin" , Eugenio =?iso-8859-1?Q?P=E9rez?= , Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , "open list:VIRTIO CORE AND NET DRIVERS" , open list References: <20250121191047.269844-1-jdamato@fastly.com> <20250121191047.269844-3-jdamato@fastly.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: On Thu, Jan 23, 2025 at 10:40:43AM +0800, Jason Wang wrote: > On Thu, Jan 23, 2025 at 1:41 AM Joe Damato wrote: > > > > On Wed, Jan 22, 2025 at 02:12:46PM +0800, Jason Wang wrote: > > > On Wed, Jan 22, 2025 at 3:11 AM Joe Damato wrote: > > > > > > > > Slight refactor to prepare the code for NAPI to queue mapping. No > > > > functional changes. > > > > > > > > Signed-off-by: Joe Damato > > > > Reviewed-by: Gerhard Engleder > > > > Tested-by: Lei Yang > > > > --- > > > > v2: > > > > - Previously patch 1 in the v1. > > > > - Added Reviewed-by and Tested-by tags to commit message. No > > > > functional changes. > > > > > > > > drivers/net/virtio_net.c | 10 ++++++++-- > > > > 1 file changed, 8 insertions(+), 2 deletions(-) > > > > > > > > diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c > > > > index 7646ddd9bef7..cff18c66b54a 100644 > > > > --- a/drivers/net/virtio_net.c > > > > +++ b/drivers/net/virtio_net.c > > > > @@ -2789,7 +2789,8 @@ static void skb_recv_done(struct virtqueue *rvq) > > > > virtqueue_napi_schedule(&rq->napi, rvq); > > > > } > > > > > > > > -static void virtnet_napi_enable(struct virtqueue *vq, struct napi_struct *napi) > > > > +static void virtnet_napi_do_enable(struct virtqueue *vq, > > > > + struct napi_struct *napi) > > > > { > > > > napi_enable(napi); > > > > > > Nit: it might be better to not have this helper to avoid a misuse of > > > this function directly. > > > > Sorry, I'm probably missing something here. > > > > Both virtnet_napi_enable and virtnet_napi_tx_enable need the logic > > in virtnet_napi_do_enable. > > > > Are you suggesting that I remove virtnet_napi_do_enable and repeat > > the block of code in there twice (in virtnet_napi_enable and > > virtnet_napi_tx_enable)? > > I think I miss something here, it looks like virtnet_napi_tx_enable() > calls virtnet_napi_do_enable() directly. > > I would like to know why we don't call netif_queue_set_napi() for TX NAPI here? Please see both the cover letter and the commit message of the next commit which addresses this question. TX-only NAPIs do not have NAPI IDs so there is nothing to map.