From owner-svn-src-stable@freebsd.org Fri Feb 16 16:05:03 2018 Return-Path: Delivered-To: svn-src-stable@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id F407BF20DBF; Fri, 16 Feb 2018 16:05:02 +0000 (UTC) (envelope-from mjg@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id A5F3082DFB; Fri, 16 Feb 2018 16:05:02 +0000 (UTC) (envelope-from mjg@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 A09597E0D; Fri, 16 Feb 2018 16:05:02 +0000 (UTC) (envelope-from mjg@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id w1GG526v076411; Fri, 16 Feb 2018 16:05:02 GMT (envelope-from mjg@FreeBSD.org) Received: (from mjg@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id w1GG527J076410; Fri, 16 Feb 2018 16:05:02 GMT (envelope-from mjg@FreeBSD.org) Message-Id: <201802161605.w1GG527J076410@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: mjg set sender to mjg@FreeBSD.org using -f From: Mateusz Guzik Date: Fri, 16 Feb 2018 16:05:02 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org Subject: svn commit: r329379 - stable/11/sys/kern X-SVN-Group: stable-11 X-SVN-Commit-Author: mjg X-SVN-Commit-Paths: stable/11/sys/kern X-SVN-Commit-Revision: 329379 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-stable@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: SVN commit messages for all the -stable branches of the src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 16 Feb 2018 16:05:03 -0000 Author: mjg Date: Fri Feb 16 16:05:02 2018 New Revision: 329379 URL: https://svnweb.freebsd.org/changeset/base/329379 Log: MFC r327874: vfs: tidy up vdrop Skip vfs_refcount_release_if_not_last if the interlock is held and just go straight to refcount_release. While here do cosmetic rearrangement of _vhold to better show it contains equivalent behaviour. Modified: stable/11/sys/kern/vfs_subr.c Directory Properties: stable/11/ (props changed) Modified: stable/11/sys/kern/vfs_subr.c ============================================================================== --- stable/11/sys/kern/vfs_subr.c Fri Feb 16 16:01:39 2018 (r329378) +++ stable/11/sys/kern/vfs_subr.c Fri Feb 16 16:05:02 2018 (r329379) @@ -2769,14 +2769,14 @@ _vhold(struct vnode *vp, bool locked) else ASSERT_VI_UNLOCKED(vp, __func__); CTR2(KTR_VFS, "%s: vp %p", __func__, vp); - if (!locked && vfs_refcount_acquire_if_not_zero(&vp->v_holdcnt)) { - VNASSERT((vp->v_iflag & VI_FREE) == 0, vp, - ("_vhold: vnode with holdcnt is free")); - return; - } - - if (!locked) + if (!locked) { + if (vfs_refcount_acquire_if_not_zero(&vp->v_holdcnt)) { + VNASSERT((vp->v_iflag & VI_FREE) == 0, vp, + ("_vhold: vnode with holdcnt is free")); + return; + } VI_LOCK(vp); + } if ((vp->v_iflag & VI_FREE) == 0) { refcount_acquire(&vp->v_holdcnt); if (!locked) @@ -2830,14 +2830,11 @@ _vdrop(struct vnode *vp, bool locked) CTR2(KTR_VFS, "%s: vp %p", __func__, vp); if ((int)vp->v_holdcnt <= 0) panic("vdrop: holdcnt %d", vp->v_holdcnt); - if (vfs_refcount_release_if_not_last(&vp->v_holdcnt)) { - if (locked) - VI_UNLOCK(vp); - return; - } - - if (!locked) + if (!locked) { + if (vfs_refcount_release_if_not_last(&vp->v_holdcnt)) + return; VI_LOCK(vp); + } if (refcount_release(&vp->v_holdcnt) == 0) { VI_UNLOCK(vp); return;