Date: Tue, 31 Mar 2015 15:37:25 +0000 (UTC) From: John Baldwin <jhb@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-10@freebsd.org Subject: svn commit: r280912 - in stable: 10/sys/kern 9/sys/kern Message-ID: <201503311537.t2VFbP7A054092@svn.freebsd.org>
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Author: jhb Date: Tue Mar 31 15:37:24 2015 New Revision: 280912 URL: https://svnweb.freebsd.org/changeset/base/280912 Log: MFC 278760: 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(). Modified: stable/10/sys/kern/vfs_subr.c Directory Properties: stable/10/ (props changed) Changes in other areas also in this revision: Modified: stable/9/sys/kern/vfs_subr.c Directory Properties: stable/9/sys/ (props changed) Modified: stable/10/sys/kern/vfs_subr.c ============================================================================== --- stable/10/sys/kern/vfs_subr.c Tue Mar 31 15:03:58 2015 (r280911) +++ stable/10/sys/kern/vfs_subr.c Tue Mar 31 15:37:24 2015 (r280912) @@ -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.
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