From owner-svn-src-all@FreeBSD.ORG Sat Jan 10 18:28:59 2015 Return-Path: Delivered-To: svn-src-all@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id AA4B3EEE; Sat, 10 Jan 2015 18:28:59 +0000 (UTC) Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:1900:2254:2068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 95B4C1F1; Sat, 10 Jan 2015 18:28:59 +0000 (UTC) Received: from svn.freebsd.org ([127.0.1.70]) by svn.freebsd.org (8.14.9/8.14.9) with ESMTP id t0AISx8J084160; Sat, 10 Jan 2015 18:28:59 GMT (envelope-from mav@FreeBSD.org) Received: (from mav@localhost) by svn.freebsd.org (8.14.9/8.14.9/Submit) id t0AISx3v084159; Sat, 10 Jan 2015 18:28:59 GMT (envelope-from mav@FreeBSD.org) Message-Id: <201501101828.t0AISx3v084159@svn.freebsd.org> X-Authentication-Warning: svn.freebsd.org: mav set sender to mav@FreeBSD.org using -f From: Alexander Motin Date: Sat, 10 Jan 2015 18:28:59 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r276913 - head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs X-SVN-Group: head MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 10 Jan 2015 18:28:59 -0000 Author: mav Date: Sat Jan 10 18:28:58 2015 New Revision: 276913 URL: https://svnweb.freebsd.org/changeset/base/276913 Log: Use new optimized dmu_read_uio_dbuf() for ZVOLs in device mode. This slightly reduces overhead by avoiding dnode_hold()/dnode_rele() calls. MFC after: 2 weeks Modified: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zvol.c Modified: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zvol.c ============================================================================== --- head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zvol.c Sat Jan 10 16:55:28 2015 (r276912) +++ head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zvol.c Sat Jan 10 18:28:58 2015 (r276913) @@ -1818,7 +1818,7 @@ zvol_read(struct cdev *dev, struct uio * if (bytes > volsize - uio->uio_loffset) bytes = volsize - uio->uio_loffset; - error = dmu_read_uio(zv->zv_objset, ZVOL_OBJ, uio, bytes); + error = dmu_read_uio_dbuf(zv->zv_dbuf, uio, bytes); if (error) { /* convert checksum errors into IO errors */ if (error == ECKSUM)