Function vdrop_deactivate

freebsd/kern/vfs_subr.c:3517–3551

* Drop the hold count of the vnode. If this is the last reference to * the vnode we place it on the free list unless it has been vgone'd * (marked VIRF_DOOMED) in which case we will free it. * * Because the vnode vm object keeps a hold reference on the vnode if * there is at least one resident non-cached page, the vnode cannot * leave the active list without the page cleanup done. */

 * leave the active list without the page cleanup done.
 */
static void
vdrop_deactivate(struct vnode *vp)
{
	struct mount *mp;

	ASSERT_VI_LOCKED(vp, __func__);
	/*
	 * Mark a vnode as free: remove it from its active list
	 * and put it up for recycling on the freelist.
	 */
	VNASSERT(!VN_IS_DOOMED(vp), vp,
	    ("vdrop: returning doomed vnode"));
	VNASSERT((vp->v_iflag & VI_OWEINACT) == 0, vp,
	    ("vnode with VI_OWEINACT set"));
	VNASSERT((vp->v_iflag & VI_DEFINACT) == 0, vp,
	    ("vnode with VI_DEFINACT set"));
	if (vp->v_mflag & VMP_LAZYLIST) {
		mp = vp->v_mount;
		mtx_lock(&mp->mnt_listmtx);
		VNASSERT(vp->v_mflag & VMP_LAZYLIST, vp, ("lost VMP_LAZYLIST"));
		/*
		 * Don't remove the vnode from the lazy list if another thread
		 * has increased the hold count. It may have re-enqueued the
		 * vnode to the lazy list and is now responsible for its
		 * removal.
		 */
		if (vp->v_holdcnt == 0) {
			vp->v_mflag &= ~VMP_LAZYLIST;
			TAILQ_REMOVE(&mp->mnt_lazyvnodelist, vp, v_lazylist);
			mp->mnt_lazyvnodelistsize--;
		}
		mtx_unlock(&mp->mnt_listmtx);
	}
	vdbatch_enqueue(vp);
}

static void __noinline
vdropl_final(struct vnode *vp)