From owner-svn-src-head@FreeBSD.ORG Sat Feb 14 17:02:52 2015 Return-Path: Delivered-To: svn-src-head@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 39837563; Sat, 14 Feb 2015 17:02:52 +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 0ACBFA74; Sat, 14 Feb 2015 17:02:52 +0000 (UTC) Received: from svn.freebsd.org ([127.0.1.70]) by svn.freebsd.org (8.14.9/8.14.9) with ESMTP id t1EH2pl6059260; Sat, 14 Feb 2015 17:02:51 GMT (envelope-from jhb@FreeBSD.org) Received: (from jhb@localhost) by svn.freebsd.org (8.14.9/8.14.9/Submit) id t1EH2pVa059259; Sat, 14 Feb 2015 17:02:51 GMT (envelope-from jhb@FreeBSD.org) Message-Id: <201502141702.t1EH2pVa059259@svn.freebsd.org> X-Authentication-Warning: svn.freebsd.org: jhb set sender to jhb@FreeBSD.org using -f From: John Baldwin Date: Sat, 14 Feb 2015 17:02:51 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r278760 - head/sys/kern X-SVN-Group: head 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: 2.1.18-1 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: Sat, 14 Feb 2015 17:02:52 -0000 Author: jhb Date: Sat Feb 14 17:02:51 2015 New Revision: 278760 URL: https://svnweb.freebsd.org/changeset/base/278760 Log: Add two new counters for vnode life cycle events: - vfs.recycles counts the number of vnodes forcefully recycled to avoid exceeding kern.maxvnodes. - vfs.vnodes_created counts the number of vnodes created by successful calls to getnewvnode(). Differential Revision: https://reviews.freebsd.org/D1671 Reviewed by: kib MFC after: 1 week Modified: head/sys/kern/vfs_subr.c Modified: head/sys/kern/vfs_subr.c ============================================================================== --- head/sys/kern/vfs_subr.c Sat Feb 14 16:23:04 2015 (r278759) +++ head/sys/kern/vfs_subr.c Sat Feb 14 17:02:51 2015 (r278760) @@ -122,6 +122,10 @@ static unsigned long numvnodes; SYSCTL_ULONG(_vfs, OID_AUTO, numvnodes, CTLFLAG_RD, &numvnodes, 0, "Number of vnodes in existence"); +static u_long vnodes_created; +SYSCTL_ULONG(_vfs, OID_AUTO, vnodes_created, CTLFLAG_RD, &vnodes_created, + 0, "Number of vnodes created by getnewvnode"); + /* * Conversion tables for conversion from vnode types to inode formats * and back. @@ -156,6 +160,10 @@ static int vlru_allow_cache_src; SYSCTL_INT(_vfs, OID_AUTO, vlru_allow_cache_src, CTLFLAG_RW, &vlru_allow_cache_src, 0, "Allow vlru to reclaim source vnode"); +static u_long recycles_count; +SYSCTL_ULONG(_vfs, OID_AUTO, recycles, CTLFLAG_RD, &recycles_count, 0, + "Number of vnodes recycled to avoid exceding kern.maxvnodes"); + /* * Various variables used for debugging the new implementation of * reassignbuf(). @@ -788,6 +796,7 @@ vlrureclaim(struct mount *mp) } KASSERT((vp->v_iflag & VI_DOOMED) == 0, ("VI_DOOMED unexpectedly detected in vlrureclaim()")); + atomic_add_long(&recycles_count, 1); vgonel(vp); VOP_UNLOCK(vp, 0); vdropl(vp); @@ -988,8 +997,10 @@ vtryrecycle(struct vnode *vp) __func__, vp); return (EBUSY); } - if ((vp->v_iflag & VI_DOOMED) == 0) + if ((vp->v_iflag & VI_DOOMED) == 0) { + atomic_add_long(&recycles_count, 1); vgonel(vp); + } VOP_UNLOCK(vp, LK_INTERLOCK); vn_finished_write(vnmp); return (0); @@ -1093,6 +1104,7 @@ getnewvnode(const char *tag, struct moun atomic_add_long(&numvnodes, 1); mtx_unlock(&vnode_free_list_mtx); alloc: + atomic_add_long(&vnodes_created, 1); vp = (struct vnode *) uma_zalloc(vnode_zone, M_WAITOK|M_ZERO); /* * Setup locks.