From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f181.google.com (mail-il1-f181.google.com [209.85.166.181]) (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 203661D318A for ; Wed, 9 Oct 2024 19:51:01 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.181 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728503463; cv=none; b=MUpHydsRht2CAyWYT+YDNdKfRTe6y7QceqZqzPJR4IhpH58cK8kjP564YtSJ+qL8hWJ4oESOG8x6/z9ECxFQDzMCdw2IVc1x1S+Afzg2NUrHwZf/MY1Ld7wZ2oQb2dbeg89I40MYtRfU4xJRTlTD0ppGBpX5wont/5PfQZbdjqY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728503463; c=relaxed/simple; bh=K3Sin6HsrhzRRP2HgMTVeCGgTRTQpKHKA+ETtOJS1ms=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=XB99FUNK5XhVT84oCshiK1ddpvCRL7Z1J3LuTVkmBhJIBgRHIDQTJ6Y0jPIl3zkbj04Bc4tc3XZF48krwBzF7+IazU9m8ChsexK58f/SIrlfCkJJ8zuJW2ME/LVf27G72v5uMSWLfX1jQLoMkKJFLTPT3bE8PhohJXUPuRrTgiA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=kernel.dk; spf=pass smtp.mailfrom=kernel.dk; dkim=pass (2048-bit key) header.d=kernel-dk.20230601.gappssmtp.com header.i=@kernel-dk.20230601.gappssmtp.com header.b=R2Nx/QM4; arc=none smtp.client-ip=209.85.166.181 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=kernel.dk Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=kernel.dk Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel-dk.20230601.gappssmtp.com header.i=@kernel-dk.20230601.gappssmtp.com header.b="R2Nx/QM4" Received: by mail-il1-f181.google.com with SMTP id e9e14a558f8ab-3a34ccc6a9aso1095255ab.1 for ; Wed, 09 Oct 2024 12:51:01 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel-dk.20230601.gappssmtp.com; s=20230601; t=1728503461; x=1729108261; darn=vger.kernel.org; h=content-transfer-encoding:in-reply-to:from:content-language :references:cc:to:subject:user-agent:mime-version:date:message-id :from:to:cc:subject:date:message-id:reply-to; bh=hyzeTwQWm4QHExZgx/HQ8cPQRRp2JJMriJXGeys4Vd0=; b=R2Nx/QM4GYFd/yEcKVat7fuhEAM13FpJ6BVnprCf5AdGFE9ov7KP4qLszjL1ZeacMA /4mBKBQJZptZUg5pS7V7GT0zTPbW2pcAcLoevBLydTZr/CLBCUfXt1yvLz0B8FuXitpe YGpzsLxGVgMao+lDavmqN/DMg3QqMddroMuCzL7RkFHFUwaopbj67/Cl+sGkIVbSvsrX iWcEGSIsQoHLH/XLcCwsYd35dC6nKUJr2ALcISpq3TnugwdJ+iNnnSF508V4K7ZiqvOg kR2fx8XF+I0p72BVCxbetEIEcBztMQFPfqLjgbIFxbhDeomVkTV2MPpyxuOeFx/naUhk M6Lw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1728503461; x=1729108261; h=content-transfer-encoding:in-reply-to:from:content-language :references:cc:to:subject:user-agent:mime-version:date:message-id :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=hyzeTwQWm4QHExZgx/HQ8cPQRRp2JJMriJXGeys4Vd0=; b=jV4OZ0z1Ltwz8grnL9Qe98FK8y2HQ9Vqr9soMaXTIERi1ybMEN0jYI1L4hL1iXmxrN y/Tu2D6F4XgPnvTDiej2u/0/lXWuL/IWzVo29QZOYbiz2IpsBRjmlMnjPmar5WqjouhT RVIbhgcp+4tj8RjkwZ/h/rabMyKHBMuHYXwvNNkKIAg20uJgOJ4M7zYpStp2cbJBeJwO ntl+TdGDk3ttWC7ztLr+wAsFlG7aefDKP3+DB5fCdLjEj76EKJso4FYa9I5eNYwBnJN/ USfJW+fOqtWWcITZfE32VeVwqoztQNFazYawFZ46cf2TGztKBxzbXlWfIHoZpo1XwHKU bJFA== X-Forwarded-Encrypted: i=1; AJvYcCUUm0hA62+t8wPik+LsFfYRkumK73LiUtNnb1s8vLMbrM2adihtUefdVR5VzWNpfT5ZISUaN1XjAg==@vger.kernel.org X-Gm-Message-State: AOJu0Yx37TJbgdhVo/pXFR68URs2GBJvW8ZRZDfo68s0t4I0Os9dLveI KpHLPwgavFeu3E5Pf5vc4N8EoWgPk8sexfSa9FVhvOwJVngLtN1+ZjMvsPUkb6M= X-Google-Smtp-Source: AGHT+IEDtXerx531mxi3pVoSP4s1yifrJRdu3yBQSw7xZ3r6OWX3zbsW/0ceQm4MVFLJHpDyf3mzGA== X-Received: by 2002:a05:6e02:1fcc:b0:3a3:9792:e9e8 with SMTP id e9e14a558f8ab-3a397ce8583mr33498195ab.5.1728503461140; Wed, 09 Oct 2024 12:51:01 -0700 (PDT) Received: from [192.168.1.116] ([96.43.243.2]) by smtp.gmail.com with ESMTPSA id 8926c6da1cb9f-4dba90f4166sm162232173.159.2024.10.09.12.51.00 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 09 Oct 2024 12:51:00 -0700 (PDT) Message-ID: <32a05d6b-1b82-467f-ac3e-f3cd2e5c0e22@kernel.dk> Date: Wed, 9 Oct 2024 13:50:59 -0600 Precedence: bulk X-Mailing-List: io-uring@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v1 12/15] io_uring/zcrx: add io_recvzc request To: Pavel Begunkov , David Wei , io-uring@vger.kernel.org, netdev@vger.kernel.org Cc: Jakub Kicinski , Paolo Abeni , "David S. Miller" , Eric Dumazet , Jesper Dangaard Brouer , David Ahern , Mina Almasry References: <20241007221603.1703699-1-dw@davidwei.uk> <20241007221603.1703699-13-dw@davidwei.uk> <703c9d90-bca1-4ee7-b1f3-0cfeaf38ef8f@kernel.dk> <7cee82f7-188f-438a-9fe1-086aeda66caf@gmail.com> <177d164a-2ebc-483a-ab53-7741974a59c4@kernel.dk> Content-Language: en-US From: Jens Axboe In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 10/9/24 1:47 PM, Pavel Begunkov wrote: > On 10/9/24 20:42, Jens Axboe wrote: >> On 10/9/24 1:27 PM, Pavel Begunkov wrote: >>>>>>> + /* All data completions are posted as aux CQEs. */ >>>>>>> + req->flags |= REQ_F_APOLL_MULTISHOT; >>>>>> >>>>>> This puzzles me a bit... >>>>> >>>>> Well, it's a multishot request. And that flag protects from cq >>>>> locking rules violations, i.e. avoiding multishot reqs from >>>>> posting from io-wq. >>>> >>>> Maybe make it more like the others and require that >>>> IORING_RECV_MULTISHOT is set then, and set it based on that? >>> >>> if (IORING_RECV_MULTISHOT) >>> return -EINVAL; >>> req->flags |= REQ_F_APOLL_MULTISHOT; >>> >>> It can be this if that's the preference. It's a bit more consistent, >>> but might be harder to use. Though I can just hide the flag behind >>> liburing helpers, would spare from neverending GH issues asking >>> why it's -EINVAL'ed >> >> Maybe I'm missing something, but why not make it: >> >> /* multishot required */ >> if (!(flags & IORING_RECV_MULTISHOT)) >> return -EINVAL; >> req->flags |= REQ_F_APOLL_MULTISHOT; > > Right, that's what I meant before spewing a non sensible snippet. ok phew, I was scratching my head there for a bit... All good then. -- Jens Axboe