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 X-Spam-Level: X-Spam-Status: No, score=-13.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C7FEFC43460 for ; Wed, 7 Apr 2021 11:34:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 921C56113B for ; Wed, 7 Apr 2021 11:34:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1343965AbhDGLfA (ORCPT ); Wed, 7 Apr 2021 07:35:00 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37650 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1347371AbhDGLe5 (ORCPT ); Wed, 7 Apr 2021 07:34:57 -0400 Received: from mail-ed1-x530.google.com (mail-ed1-x530.google.com [IPv6:2a00:1450:4864:20::530]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 291D4C061756 for ; Wed, 7 Apr 2021 04:34:48 -0700 (PDT) Received: by mail-ed1-x530.google.com with SMTP id p4so10152612edr.2 for ; Wed, 07 Apr 2021 04:34:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ionos.com; s=google; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=1yEn1S7vRpSE4v84fcQ+X2rl1hB3xf/Gs67lTQQGsts=; b=dDLaxLBftjgt05EaLzDMDqMR/tqv4rkKNABP2+cwhZjSthf7NE7M+CuQF89RR5kFUB Ic7u92kNQSM9Vvkdj/CuowhrDWuM9G/Z24vx28A3O4hn5bICF1MnS8lXkrh3I9kjdTCf WOQizeaY2tmBMat5Dt2dkvoYJGbj3BWJcGZKvv9fileHrqVKPlP2Og00Lozfwa+7nIIP kLhtz2ZY7wnD3dJlpqKOQwvhg4XU2iddr3r5wLlsWiWqKHUfBLJp7w4xG0MKGnPitNP5 kqg9RcI19WbS21bAs5CU4CsSIWNKpFxmQaKwxJot/a8xRl1O3goT+WCcDtrGSAf12oCb 6MJQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=1yEn1S7vRpSE4v84fcQ+X2rl1hB3xf/Gs67lTQQGsts=; b=HXvJ7BCL9L/R3UvhqGVKnuIgp+LECHaOK20pIi2Grk6Sdq5JPqnlpkKsZGMqTx+PGy ++2vRq6tWJaKxsOMtYamASw8UpH39MTY22tg9lMRvEAV87Xt4TNrR2xRfWi9ADEwO4Gu 25pUJaSrBWRDLo9DU4pgjYsaT0gL1ot3Tj3ROluuGULy1N46MUNYugtYlOhrnf6Kt+ex EACSBCBVmR8QQu0Ii/7R/SPS3TKAkxYaqD2LdNw1/d2RNDITffi3k2Piw6ypDbP1zZAR C8VfcnG8Y7JsZcZM6WvfFa52KCKztzGVxfkn6OkR3KaiF2f4cP4UKGkEV7wLPgIOASZo PMYQ== X-Gm-Message-State: AOAM533Yan+/DA1D0PQsWzmaxMeBz6+JZgmPyh77TO/eWeYQfBMdLqLH /QTXwIhFbxRgIOSfDyQF/fmz7CIirVHha0hG X-Google-Smtp-Source: ABdhPJwcD6hpnlYqx3O+nCYkxR7aJTwbp1CcD2MavTEMnbbV59kluKk50tKhjuhPFJgABat5rwluDQ== X-Received: by 2002:aa7:da97:: with SMTP id q23mr3779336eds.180.1617795286835; Wed, 07 Apr 2021 04:34:46 -0700 (PDT) Received: from gkim-laptop.fkb.profitbricks.net (ip5f5aeee5.dynamic.kabel-deutschland.de. [95.90.238.229]) by smtp.googlemail.com with ESMTPSA id a9sm15491186eds.33.2021.04.07.04.34.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 07 Apr 2021 04:34:46 -0700 (PDT) From: Gioh Kim To: linux-rdma@vger.kernel.org Cc: bvanassche@acm.org, leon@kernel.org, dledford@redhat.com, jgg@ziepe.ca, haris.iqbal@ionos.com, jinpu.wang@ionos.com, Gioh Kim Subject: [PATCHv3 for-next 0/4] New multipath policy for RTRS client Date: Wed, 7 Apr 2021 13:34:40 +0200 Message-Id: <20210407113444.150961-1-gi-oh.kim@ionos.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org This patch set introduces new multipath policy 'min-latency'. The latency is a time calculated by the heart-beat messages. Whenever the client sends heart-beat message, it checks the time gap between sending the heart-beat message and receiving the ACK. So this value can be changed regularly. If client has multi-path, it can send IO via a path having the least latency. V3->V2: use sysfs_emit instead of scnprintf V2->V1: use sysfs_emit instead of sprintf Gioh Kim (3): RDMA/rtrs-clt: Add a minimum latency multipath policy RDMA/rtrs-clt: new sysfs attribute to print the latency of each path Documentation/ABI/rtrs-clt: Add descriptions for min-latency policy Md Haris Iqbal (1): RDMA/rtrs-clt: Check state of the rtrs_clt_sess before reading its stats .../ABI/testing/sysfs-class-rtrs-client | 12 ++++ drivers/infiniband/ulp/rtrs/rtrs-clt-sysfs.c | 35 ++++++++++- drivers/infiniband/ulp/rtrs/rtrs-clt.c | 60 ++++++++++++++++++- drivers/infiniband/ulp/rtrs/rtrs-clt.h | 1 + drivers/infiniband/ulp/rtrs/rtrs-pri.h | 2 + drivers/infiniband/ulp/rtrs/rtrs.c | 3 + 6 files changed, 109 insertions(+), 4 deletions(-) -- 2.25.1