From patchwork Wed Feb 20 03:03:37 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Trond Myklebust X-Patchwork-Id: 10821127 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id EB039922 for ; Wed, 20 Feb 2019 03:04:52 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D59F92C309 for ; Wed, 20 Feb 2019 03:04:52 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id CA2752C39B; Wed, 20 Feb 2019 03:04:52 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FROM,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id EAD542C309 for ; Wed, 20 Feb 2019 03:04:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729522AbfBTDEu (ORCPT ); Tue, 19 Feb 2019 22:04:50 -0500 Received: from mail-it1-f193.google.com ([209.85.166.193]:36845 "EHLO mail-it1-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727576AbfBTDEu (ORCPT ); Tue, 19 Feb 2019 22:04:50 -0500 Received: by mail-it1-f193.google.com with SMTP id h6so12136899itl.1 for ; Tue, 19 Feb 2019 19:04:49 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:subject:date:message-id:mime-version :content-transfer-encoding; bh=SHIy88zDE+3aRCcqGowgVrHgFFfcscEsO3caI+RiFnI=; b=I1QoQQsBO9muF2TZzev1c7R19eCE53MkfXEviYIXadqN7gZoziju23JAIMqSZBrbZ/ 3KW1Lk+idsHU9qw4XsUbWjwYy/tYociqVHCXDIrCmeSZTvkkS+OGzwKCIMtWpUqbJIhP DIRheOwg748voNcNUAWFDa77qfYZNMtupfBaMXBeOZ/XQXF09H+kAgD0emi+ZsRIzaay asA9muFGynTgIV9NwXOQb/UmgzSYpwcmJNMAtRPL172sXyW4j4Lxg7dfIC2nnev2hdqC Uu+yf1vv2G1Sl3hVbjmUmePK2KPflOPbVNGzKwktid7kiFp/4TG6njuPcgqj6Lyiaq7S XyOg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:subject:date:message-id:mime-version :content-transfer-encoding; bh=SHIy88zDE+3aRCcqGowgVrHgFFfcscEsO3caI+RiFnI=; b=sSM9q6q09vPxyX1recDA0e+CdJtEeQD0sa2C52/Pkc+fCDp0/aT7eyFI7yyZn0Qe7r wfSeCyecAqC0+6+wqQQ2NXAaq7BN9ZbiQFoO7/jTu7X2gLFwHx187s4RoEg7kApbWGOI pPALFBJQL0OfwV93eQgquR8anH3ENMh85x+3SgmJuxCAsSokKKQPSCZA/9fpENBhaFVU K3SnMnHkfCA0cpTzCishoIyzE3fNH7DgOw58KPggWthrkUnhE10OtgD6o2LDYV2xdhDG 9dqy8FTuk9i189Z3+qaHqQeNVFf1e+zmarH9WMkFwBZ2aTxG+bDt9S67Z5PSRUnra+PQ Ukyg== X-Gm-Message-State: AHQUAuaPngoRrnag02nomdaJCqjiiUC6z7C75dJPE+EHsN2auHKztk9L obrVrsQ86utvJOUD2VEzbMRWFFw= X-Google-Smtp-Source: AHgI3Iah8iuMsx3Ft6Re03yGwup9JPjNEAs5wd4MBWaxufxdJlwKUk75gLDi0BPz5eUP6/BxcvBL2Q== X-Received: by 2002:a02:660e:: with SMTP id k14mr17994573jac.34.1550631889082; Tue, 19 Feb 2019 19:04:49 -0800 (PST) Received: from localhost.localdomain (c-68-40-189-247.hsd1.mi.comcast.net. [68.40.189.247]) by smtp.gmail.com with ESMTPSA id a192sm2036924ita.0.2019.02.19.19.04.48 for (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Tue, 19 Feb 2019 19:04:48 -0800 (PST) From: Trond Myklebust X-Google-Original-From: Trond Myklebust To: linux-nfs@vger.kernel.org Subject: [PATCH 0/4] Simplify the RPC client socket transmit code Date: Tue, 19 Feb 2019 22:03:37 -0500 Message-Id: <20190220030341.58766-1-trond.myklebust@hammerspace.com> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Simplify the RPC socket transmission code by switching to using the iov_iter functionality. The main gain is that we avoid the need to take the socket lock on each call to sendpage(): in the common case of a 1MB WRITE rpc call using 4k page sizes, that means we go from 256 calls to sendpage(), each of which takes the socket lock and releases it, to just 1 call to sock_sendmsg(). Trond Myklebust (4): SUNRPC: Convert xs_send_kvec() to use iov_iter_kvec() SUNRPC: Convert socket page send code to use iov_iter() SUNRPC: Further cleanups of xs_sendpages() SUNRPC: Remove the redundant 'zerocopy' argument to xs_sendpages() net/sunrpc/xprt.c | 1 + net/sunrpc/xprtsock.c | 106 +++++++++++++++--------------------------- 2 files changed, 38 insertions(+), 69 deletions(-)