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[23.128.96.18]) by mx.google.com with ESMTP id ks7si2279707ejb.375.2020.10.06.08.21.57; Tue, 06 Oct 2020 08:22:22 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-nfs-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@oracle.com header.s=corp-2020-01-29 header.b=kiSynOe3; spf=pass (google.com: domain of linux-nfs-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-nfs-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=oracle.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726087AbgJFPUs (ORCPT + 99 others); Tue, 6 Oct 2020 11:20:48 -0400 Received: from aserp2120.oracle.com ([141.146.126.78]:40564 "EHLO aserp2120.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726064AbgJFPUr (ORCPT ); Tue, 6 Oct 2020 11:20:47 -0400 Received: from pps.filterd (aserp2120.oracle.com [127.0.0.1]) by aserp2120.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 096F9stq114655; Tue, 6 Oct 2020 15:20:46 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=content-type : mime-version : subject : from : in-reply-to : date : cc : content-transfer-encoding : message-id : references : to; s=corp-2020-01-29; bh=nI06Xvk+gwMY98EtJUT1t7Xy+RBhr5ZAgzz1Dszqy7w=; b=kiSynOe3qxcmgfyuzIEs/+6UBL7Ca2sHOZFqzLpAoG3rvHDliPIgGFo/hJ1NCoayfOh0 qT3ZI2s18GXBI4x1j8pIkttb4vTZP4RY2X3l7JpOECESkcadjC15be+FweLS+/cNgW8W oaqqSsAKSYrl+Lp2ThDlwj8ahlaN6AdtObtPkSWWq46IhevYTFU29tQtx82p1UV+nh24 LCKFibbefrqYCnfRB2pPTNVgwXy606KtZEBEwQ6d2Lhk/csCfYuBca0oYrCg5JA8g32h HXhtvH+LcuynyNNNdozJSlQC/peU7A5GC1gl+KOn1wol5iFdVJGeFniGGjziJR/iuag/ ag== Received: from userp3020.oracle.com (userp3020.oracle.com [156.151.31.79]) by aserp2120.oracle.com with ESMTP id 33ym34hrax-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 06 Oct 2020 15:20:46 +0000 Received: from pps.filterd (userp3020.oracle.com [127.0.0.1]) by userp3020.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 096F5B83046281; Tue, 6 Oct 2020 15:20:45 GMT Received: from aserv0122.oracle.com (aserv0122.oracle.com [141.146.126.236]) by userp3020.oracle.com with ESMTP id 33yyjfrwb3-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 06 Oct 2020 15:20:45 +0000 Received: from abhmp0001.oracle.com (abhmp0001.oracle.com [141.146.116.7]) by aserv0122.oracle.com (8.14.4/8.14.4) with ESMTP id 096FKhmI030567; Tue, 6 Oct 2020 15:20:44 GMT Received: from anon-dhcp-152.1015granger.net (/68.61.232.219) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Tue, 06 Oct 2020 08:20:42 -0700 Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 13.4 \(3608.120.23.2.4\)) Subject: Re: unsharing tcp connections from different NFS mounts From: Chuck Lever In-Reply-To: <20201006151335.GB28306@fieldses.org> Date: Tue, 6 Oct 2020 11:20:41 -0400 Cc: Linux NFS Mailing List Content-Transfer-Encoding: 7bit Message-Id: <43CA4047-F058-4339-AD64-29453AE215D6@oracle.com> References: <20201006151335.GB28306@fieldses.org> To: Bruce Fields X-Mailer: Apple Mail (2.3608.120.23.2.4) X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9765 signatures=668680 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 adultscore=0 bulkscore=0 phishscore=0 mlxlogscore=999 mlxscore=0 spamscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2006250000 definitions=main-2010060100 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9765 signatures=668680 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 impostorscore=0 priorityscore=1501 mlxscore=0 mlxlogscore=999 clxscore=1015 bulkscore=0 spamscore=0 malwarescore=0 phishscore=0 suspectscore=0 adultscore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2006250000 definitions=main-2010060100 Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org > On Oct 6, 2020, at 11:13 AM, bfields@fieldses.org wrote: > > NFSv4.1+ differs from earlier versions in that it always performs > trunking discovery that results in mounts to the same server sharing a > TCP connection. > > It turns out this results in performance regressions for some users; > apparently the workload on one mount interferes with performance of > another mount, and they were previously able to work around the problem > by using different server IP addresses for the different mounts. > > Am I overlooking some hack that would reenable the previous behavior? > Or would people be averse to an "-o noshareconn" option? I thought this was what the nconnect mount option was for. -- Chuck Lever