From owner-svn-src-head@freebsd.org Thu Jul 2 10:44:46 2020 Return-Path: Delivered-To: svn-src-head@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 58DE5351C02; Thu, 2 Jul 2020 10:44:46 +0000 (UTC) (envelope-from kib@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 49yF8t1m4lz4fZJ; Thu, 2 Jul 2020 10:44:46 +0000 (UTC) (envelope-from kib@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 1FD5119335; Thu, 2 Jul 2020 10:44:46 +0000 (UTC) (envelope-from kib@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id 062AikLB007425; Thu, 2 Jul 2020 10:44:46 GMT (envelope-from kib@FreeBSD.org) Received: (from kib@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id 062Aij2U007424; Thu, 2 Jul 2020 10:44:45 GMT (envelope-from kib@FreeBSD.org) Message-Id: <202007021044.062Aij2U007424@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: kib set sender to kib@FreeBSD.org using -f From: Konstantin Belousov Date: Thu, 2 Jul 2020 10:44:45 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r362887 - head/sys/dev/mlx5/mlx5_core X-SVN-Group: head X-SVN-Commit-Author: kib X-SVN-Commit-Paths: head/sys/dev/mlx5/mlx5_core X-SVN-Commit-Revision: 362887 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.33 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 02 Jul 2020 10:44:46 -0000 Author: kib Date: Thu Jul 2 10:44:45 2020 New Revision: 362887 URL: https://svnweb.freebsd.org/changeset/base/362887 Log: mlx5_core: remove unneccessary LFENCE instruction. Use fence instead of barrier, which is optimized to take advantage of the x86 TSO memory model. Reviewed by: hselasky Sponsored by: Mellanox Technologies MFC after: 1 week Modified: head/sys/dev/mlx5/mlx5_core/mlx5_eq.c Modified: head/sys/dev/mlx5/mlx5_core/mlx5_eq.c ============================================================================== --- head/sys/dev/mlx5/mlx5_core/mlx5_eq.c Thu Jul 2 10:42:58 2020 (r362886) +++ head/sys/dev/mlx5/mlx5_core/mlx5_eq.c Thu Jul 2 10:44:45 2020 (r362887) @@ -240,7 +240,7 @@ static int mlx5_eq_int(struct mlx5_core_dev *dev, stru * Make sure we read EQ entry contents after we've * checked the ownership bit. */ - rmb(); + atomic_thread_fence_acq(); mlx5_core_dbg(eq->dev, "eqn %d, eqe type %s\n", eq->eqn, eqe_type_str(eqe->type));