From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 56E67C433FE for ; Mon, 7 Feb 2022 09:13:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234173AbiBGJNG (ORCPT ); Mon, 7 Feb 2022 04:13:06 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49890 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S245401AbiBGJMO (ORCPT ); Mon, 7 Feb 2022 04:12:14 -0500 X-Greylist: delayed 4516 seconds by postgrey-1.37 at lindbergh.monkeyblade.net; Mon, 07 Feb 2022 01:12:14 PST Received: from mx0a-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1E99EC043181; Mon, 7 Feb 2022 01:12:14 -0800 (PST) Received: from pps.filterd (m0098414.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.1.2/8.16.1.2) with SMTP id 2177dKcT022209; Mon, 7 Feb 2022 07:56:53 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=message-id : date : mime-version : subject : to : cc : references : from : in-reply-to : content-type : content-transfer-encoding; s=pp1; bh=4vHe0hfsbePIULa05kdsdONJz5eXqQ8qTALiPoS6ngo=; b=sS3lo7zRXpzrfxtn0nz8aYVr37AMuMkE7RotrvE5If8ltACXw68Yx5lwKXs1bt660c/U fMU/Sj6wqLpvZ9nwgv0EE4WEIgOYtYe3Kvd3cUtn8rMdabYRwzg5G3kWZr4zFuZa82Jd s9n+WcbDOjwedxYRJMfDXNgXj6vlZwGr/rogYLmYFYL5o0Y0yzxzIxfT4JUNe3+WIr8c dnuySmgBs6JiuLQh99hSq+a3m7/q15/zv/xqriOeE3tanukFpPbCuf4oDCf4dC8FaxR7 ls4QV9iMB/yExD7YVY/3Ky4aR0q8zQ/5hO2rW8wjGXQMLnyQ3e8PFoxR/yWvURIEqOnM IA== Received: from pps.reinject (localhost [127.0.0.1]) by mx0b-001b2d01.pphosted.com with ESMTP id 3e1hux256b-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 07 Feb 2022 07:56:53 +0000 Received: from m0098414.ppops.net (m0098414.ppops.net [127.0.0.1]) by pps.reinject (8.16.0.43/8.16.0.43) with SMTP id 2177dlhh023084; Mon, 7 Feb 2022 07:56:53 GMT Received: from ppma02fra.de.ibm.com (47.49.7a9f.ip4.static.sl-reverse.com [159.122.73.71]) by mx0b-001b2d01.pphosted.com with ESMTP id 3e1hux2562-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 07 Feb 2022 07:56:53 +0000 Received: from pps.filterd (ppma02fra.de.ibm.com [127.0.0.1]) by ppma02fra.de.ibm.com (8.16.1.2/8.16.1.2) with SMTP id 2177ufHS030283; Mon, 7 Feb 2022 07:56:51 GMT Received: from b06cxnps4076.portsmouth.uk.ibm.com (d06relay13.portsmouth.uk.ibm.com [9.149.109.198]) by ppma02fra.de.ibm.com with ESMTP id 3e1gv910xg-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 07 Feb 2022 07:56:51 +0000 Received: from d06av23.portsmouth.uk.ibm.com (d06av23.portsmouth.uk.ibm.com [9.149.105.59]) by b06cxnps4076.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 2177umQo38666612 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 7 Feb 2022 07:56:48 GMT Received: from d06av23.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 918D3A4069; Mon, 7 Feb 2022 07:56:48 +0000 (GMT) Received: from d06av23.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 2F20BA405D; Mon, 7 Feb 2022 07:56:48 +0000 (GMT) Received: from [9.145.72.174] (unknown [9.145.72.174]) by d06av23.portsmouth.uk.ibm.com (Postfix) with ESMTP; Mon, 7 Feb 2022 07:56:48 +0000 (GMT) Message-ID: Date: Mon, 7 Feb 2022 08:56:55 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:91.0) Gecko/20100101 Thunderbird/91.5.0 Subject: Re: [PATCH net-next v4 3/3] net/smc: Fallback when handshake workqueue congested Content-Language: en-US To: "D. Wythe" Cc: kuba@kernel.org, davem@davemloft.net, netdev@vger.kernel.org, linux-s390@vger.kernel.org, linux-rdma@vger.kernel.org, Tony Lu References: <6deeca64bfecbd01d724092a1a2c91ca8bce3ce0.1644214112.git.alibuda@linux.alibaba.com> From: Karsten Graul Organization: IBM Deutschland Research & Development GmbH In-Reply-To: <6deeca64bfecbd01d724092a1a2c91ca8bce3ce0.1644214112.git.alibuda@linux.alibaba.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: 5uaSxH1PiSj0gRVoqSrfrW1bta8CWQh3 X-Proofpoint-GUID: GkN4-dhYh0EYozanWDR8TrPaMXSJp0wh X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.816,Hydra:6.0.425,FMLib:17.11.62.513 definitions=2022-02-07_02,2022-02-03_01,2021-12-02_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 phishscore=0 impostorscore=0 bulkscore=0 adultscore=0 priorityscore=1501 suspectscore=0 mlxscore=0 mlxlogscore=999 spamscore=0 malwarescore=0 clxscore=1015 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2201110000 definitions=main-2202070049 Precedence: bulk List-ID: X-Mailing-List: linux-s390@vger.kernel.org On 07/02/2022 07:24, D. Wythe wrote: > From: "D. Wythe" > > This patch intends to provide a mechanism to allow automatic fallback to > TCP according to the pressure of SMC handshake process. At present, > frequent visits will cause the incoming connections to be backlogged in > SMC handshake queue, raise the connections established time. Which is > quite unacceptable for those applications who base on short lived > connections. I hope I didn't miss any news, but with your latest reply to the v2 series you questioned the config option in this v4 patch, so this is still work in progress, right?