diff --git a/sys/nfs/nfs.h b/sys/nfs/nfs.h
index e07a4f5315d1..5c5a8237f13f 100644
--- a/sys/nfs/nfs.h
+++ b/sys/nfs/nfs.h
@@ -616,7 +616,7 @@ int	nfs_request __P((struct vnode *, struct mbuf *, int, struct proc *,
 			 struct ucred *, struct mbuf **, struct mbuf **,
 			 caddr_t *));
 int	nfs_loadattrcache __P((struct vnode **, struct mbuf **, caddr_t *,
-			       struct vattr *));
+			       struct vattr *, int));
 int	nfs_namei __P((struct nameidata *, fhandle_t *, int,
 		       struct nfssvc_sock *, struct sockaddr *, struct mbuf **,
 		       caddr_t *, struct vnode **, struct proc *, int, int));
diff --git a/sys/nfs/nfs_common.c b/sys/nfs/nfs_common.c
index 59344652002a..95f7d5b22970 100644
--- a/sys/nfs/nfs_common.c
+++ b/sys/nfs/nfs_common.c
@@ -1203,11 +1203,12 @@ nfs_uninit(vfsp)
  *    copy the attributes to *vaper
  */
 int
-nfs_loadattrcache(vpp, mdp, dposp, vaper)
+nfs_loadattrcache(vpp, mdp, dposp, vaper, dontshrink)
 	struct vnode **vpp;
 	struct mbuf **mdp;
 	caddr_t *dposp;
 	struct vattr *vaper;
+	int dontshrink;
 {
 	register struct vnode *vp = *vpp;
 	register struct vattr *vap;
@@ -1323,9 +1324,18 @@ nfs_loadattrcache(vpp, mdp, dposp, vaper)
 		vap->va_gen = fxdr_unsigned(u_int32_t,fp->fa2_ctime.nfsv2_usec);
 		vap->va_filerev = 0;
 	}
+	np->n_attrstamp = time_second;
 	if (vap->va_size != np->n_size) {
 		if (vap->va_type == VREG) {
-			if (np->n_flag & NMODIFIED) {
+			if (dontshrink && vap->va_size < np->n_size) {
+				/*
+				 * We've been told not to shrink the file;
+				 * zero np->n_attrstamp to indicate that
+				 * the attributes are stale.
+				 */
+				vap->va_size = np->n_size;
+				np->n_attrstamp = 0;
+			} else if (np->n_flag & NMODIFIED) {
 				if (vap->va_size < np->n_size)
 					vap->va_size = np->n_size;
 				else
@@ -1338,7 +1348,6 @@ nfs_loadattrcache(vpp, mdp, dposp, vaper)
 			np->n_size = vap->va_size;
 		}
 	}
-	np->n_attrstamp = time_second;
 	if (vaper != NULL) {
 		bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(*vap));
 		if (np->n_flag & NCHG) {
diff --git a/sys/nfs/nfs_common.h b/sys/nfs/nfs_common.h
index b13c0099b816..0990fe4e0121 100644
--- a/sys/nfs/nfs_common.h
+++ b/sys/nfs/nfs_common.h
@@ -212,7 +212,7 @@ struct mbuf *nfsm_rpchead __P((struct ucred *cr, int nmflag, int procid,
 #define	nfsm_loadattr(v, a) \
 	do { \
 		struct vnode *ttvp = (v); \
-		if ((t1 = nfs_loadattrcache(&ttvp, &md, &dpos, (a))) != 0) { \
+		if ((t1 = nfs_loadattrcache(&ttvp, &md, &dpos, (a), 0)) != 0) { \
 			error = t1; \
 			m_freem(mrep); \
 			goto nfsmout; \
@@ -226,7 +226,7 @@ struct mbuf *nfsm_rpchead __P((struct ucred *cr, int nmflag, int procid,
 		nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \
 		if (((f) = fxdr_unsigned(int, *tl)) != 0) { \
 			if ((t1 = nfs_loadattrcache(&ttvp, &md, &dpos, \
-				(struct vattr *)0)) != 0) { \
+				(struct vattr *)0, 1)) != 0) { \
 				error = t1; \
 				(f) = 0; \
 				m_freem(mrep); \
diff --git a/sys/nfs/nfs_subs.c b/sys/nfs/nfs_subs.c
index 59344652002a..95f7d5b22970 100644
--- a/sys/nfs/nfs_subs.c
+++ b/sys/nfs/nfs_subs.c
@@ -1203,11 +1203,12 @@ nfs_uninit(vfsp)
  *    copy the attributes to *vaper
  */
 int
-nfs_loadattrcache(vpp, mdp, dposp, vaper)
+nfs_loadattrcache(vpp, mdp, dposp, vaper, dontshrink)
 	struct vnode **vpp;
 	struct mbuf **mdp;
 	caddr_t *dposp;
 	struct vattr *vaper;
+	int dontshrink;
 {
 	register struct vnode *vp = *vpp;
 	register struct vattr *vap;
@@ -1323,9 +1324,18 @@ nfs_loadattrcache(vpp, mdp, dposp, vaper)
 		vap->va_gen = fxdr_unsigned(u_int32_t,fp->fa2_ctime.nfsv2_usec);
 		vap->va_filerev = 0;
 	}
+	np->n_attrstamp = time_second;
 	if (vap->va_size != np->n_size) {
 		if (vap->va_type == VREG) {
-			if (np->n_flag & NMODIFIED) {
+			if (dontshrink && vap->va_size < np->n_size) {
+				/*
+				 * We've been told not to shrink the file;
+				 * zero np->n_attrstamp to indicate that
+				 * the attributes are stale.
+				 */
+				vap->va_size = np->n_size;
+				np->n_attrstamp = 0;
+			} else if (np->n_flag & NMODIFIED) {
 				if (vap->va_size < np->n_size)
 					vap->va_size = np->n_size;
 				else
@@ -1338,7 +1348,6 @@ nfs_loadattrcache(vpp, mdp, dposp, vaper)
 			np->n_size = vap->va_size;
 		}
 	}
-	np->n_attrstamp = time_second;
 	if (vaper != NULL) {
 		bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(*vap));
 		if (np->n_flag & NCHG) {
diff --git a/sys/nfs/nfsm_subs.h b/sys/nfs/nfsm_subs.h
index b13c0099b816..0990fe4e0121 100644
--- a/sys/nfs/nfsm_subs.h
+++ b/sys/nfs/nfsm_subs.h
@@ -212,7 +212,7 @@ struct mbuf *nfsm_rpchead __P((struct ucred *cr, int nmflag, int procid,
 #define	nfsm_loadattr(v, a) \
 	do { \
 		struct vnode *ttvp = (v); \
-		if ((t1 = nfs_loadattrcache(&ttvp, &md, &dpos, (a))) != 0) { \
+		if ((t1 = nfs_loadattrcache(&ttvp, &md, &dpos, (a), 0)) != 0) { \
 			error = t1; \
 			m_freem(mrep); \
 			goto nfsmout; \
@@ -226,7 +226,7 @@ struct mbuf *nfsm_rpchead __P((struct ucred *cr, int nmflag, int procid,
 		nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \
 		if (((f) = fxdr_unsigned(int, *tl)) != 0) { \
 			if ((t1 = nfs_loadattrcache(&ttvp, &md, &dpos, \
-				(struct vattr *)0)) != 0) { \
+				(struct vattr *)0, 1)) != 0) { \
 				error = t1; \
 				(f) = 0; \
 				m_freem(mrep); \
diff --git a/sys/nfsclient/nfs.h b/sys/nfsclient/nfs.h
index e07a4f5315d1..5c5a8237f13f 100644
--- a/sys/nfsclient/nfs.h
+++ b/sys/nfsclient/nfs.h
@@ -616,7 +616,7 @@ int	nfs_request __P((struct vnode *, struct mbuf *, int, struct proc *,
 			 struct ucred *, struct mbuf **, struct mbuf **,
 			 caddr_t *));
 int	nfs_loadattrcache __P((struct vnode **, struct mbuf **, caddr_t *,
-			       struct vattr *));
+			       struct vattr *, int));
 int	nfs_namei __P((struct nameidata *, fhandle_t *, int,
 		       struct nfssvc_sock *, struct sockaddr *, struct mbuf **,
 		       caddr_t *, struct vnode **, struct proc *, int, int));
diff --git a/sys/nfsclient/nfs_subs.c b/sys/nfsclient/nfs_subs.c
index 59344652002a..95f7d5b22970 100644
--- a/sys/nfsclient/nfs_subs.c
+++ b/sys/nfsclient/nfs_subs.c
@@ -1203,11 +1203,12 @@ nfs_uninit(vfsp)
  *    copy the attributes to *vaper
  */
 int
-nfs_loadattrcache(vpp, mdp, dposp, vaper)
+nfs_loadattrcache(vpp, mdp, dposp, vaper, dontshrink)
 	struct vnode **vpp;
 	struct mbuf **mdp;
 	caddr_t *dposp;
 	struct vattr *vaper;
+	int dontshrink;
 {
 	register struct vnode *vp = *vpp;
 	register struct vattr *vap;
@@ -1323,9 +1324,18 @@ nfs_loadattrcache(vpp, mdp, dposp, vaper)
 		vap->va_gen = fxdr_unsigned(u_int32_t,fp->fa2_ctime.nfsv2_usec);
 		vap->va_filerev = 0;
 	}
+	np->n_attrstamp = time_second;
 	if (vap->va_size != np->n_size) {
 		if (vap->va_type == VREG) {
-			if (np->n_flag & NMODIFIED) {
+			if (dontshrink && vap->va_size < np->n_size) {
+				/*
+				 * We've been told not to shrink the file;
+				 * zero np->n_attrstamp to indicate that
+				 * the attributes are stale.
+				 */
+				vap->va_size = np->n_size;
+				np->n_attrstamp = 0;
+			} else if (np->n_flag & NMODIFIED) {
 				if (vap->va_size < np->n_size)
 					vap->va_size = np->n_size;
 				else
@@ -1338,7 +1348,6 @@ nfs_loadattrcache(vpp, mdp, dposp, vaper)
 			np->n_size = vap->va_size;
 		}
 	}
-	np->n_attrstamp = time_second;
 	if (vaper != NULL) {
 		bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(*vap));
 		if (np->n_flag & NCHG) {
diff --git a/sys/nfsclient/nfsargs.h b/sys/nfsclient/nfsargs.h
index e07a4f5315d1..5c5a8237f13f 100644
--- a/sys/nfsclient/nfsargs.h
+++ b/sys/nfsclient/nfsargs.h
@@ -616,7 +616,7 @@ int	nfs_request __P((struct vnode *, struct mbuf *, int, struct proc *,
 			 struct ucred *, struct mbuf **, struct mbuf **,
 			 caddr_t *));
 int	nfs_loadattrcache __P((struct vnode **, struct mbuf **, caddr_t *,
-			       struct vattr *));
+			       struct vattr *, int));
 int	nfs_namei __P((struct nameidata *, fhandle_t *, int,
 		       struct nfssvc_sock *, struct sockaddr *, struct mbuf **,
 		       caddr_t *, struct vnode **, struct proc *, int, int));
diff --git a/sys/nfsclient/nfsm_subs.h b/sys/nfsclient/nfsm_subs.h
index b13c0099b816..0990fe4e0121 100644
--- a/sys/nfsclient/nfsm_subs.h
+++ b/sys/nfsclient/nfsm_subs.h
@@ -212,7 +212,7 @@ struct mbuf *nfsm_rpchead __P((struct ucred *cr, int nmflag, int procid,
 #define	nfsm_loadattr(v, a) \
 	do { \
 		struct vnode *ttvp = (v); \
-		if ((t1 = nfs_loadattrcache(&ttvp, &md, &dpos, (a))) != 0) { \
+		if ((t1 = nfs_loadattrcache(&ttvp, &md, &dpos, (a), 0)) != 0) { \
 			error = t1; \
 			m_freem(mrep); \
 			goto nfsmout; \
@@ -226,7 +226,7 @@ struct mbuf *nfsm_rpchead __P((struct ucred *cr, int nmflag, int procid,
 		nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \
 		if (((f) = fxdr_unsigned(int, *tl)) != 0) { \
 			if ((t1 = nfs_loadattrcache(&ttvp, &md, &dpos, \
-				(struct vattr *)0)) != 0) { \
+				(struct vattr *)0, 1)) != 0) { \
 				error = t1; \
 				(f) = 0; \
 				m_freem(mrep); \
diff --git a/sys/nfsclient/nfsstats.h b/sys/nfsclient/nfsstats.h
index e07a4f5315d1..5c5a8237f13f 100644
--- a/sys/nfsclient/nfsstats.h
+++ b/sys/nfsclient/nfsstats.h
@@ -616,7 +616,7 @@ int	nfs_request __P((struct vnode *, struct mbuf *, int, struct proc *,
 			 struct ucred *, struct mbuf **, struct mbuf **,
 			 caddr_t *));
 int	nfs_loadattrcache __P((struct vnode **, struct mbuf **, caddr_t *,
-			       struct vattr *));
+			       struct vattr *, int));
 int	nfs_namei __P((struct nameidata *, fhandle_t *, int,
 		       struct nfssvc_sock *, struct sockaddr *, struct mbuf **,
 		       caddr_t *, struct vnode **, struct proc *, int, int));
diff --git a/sys/nfsserver/nfs.h b/sys/nfsserver/nfs.h
index e07a4f5315d1..5c5a8237f13f 100644
--- a/sys/nfsserver/nfs.h
+++ b/sys/nfsserver/nfs.h
@@ -616,7 +616,7 @@ int	nfs_request __P((struct vnode *, struct mbuf *, int, struct proc *,
 			 struct ucred *, struct mbuf **, struct mbuf **,
 			 caddr_t *));
 int	nfs_loadattrcache __P((struct vnode **, struct mbuf **, caddr_t *,
-			       struct vattr *));
+			       struct vattr *, int));
 int	nfs_namei __P((struct nameidata *, fhandle_t *, int,
 		       struct nfssvc_sock *, struct sockaddr *, struct mbuf **,
 		       caddr_t *, struct vnode **, struct proc *, int, int));
diff --git a/sys/nfsserver/nfs_srvsubs.c b/sys/nfsserver/nfs_srvsubs.c
index 59344652002a..95f7d5b22970 100644
--- a/sys/nfsserver/nfs_srvsubs.c
+++ b/sys/nfsserver/nfs_srvsubs.c
@@ -1203,11 +1203,12 @@ nfs_uninit(vfsp)
  *    copy the attributes to *vaper
  */
 int
-nfs_loadattrcache(vpp, mdp, dposp, vaper)
+nfs_loadattrcache(vpp, mdp, dposp, vaper, dontshrink)
 	struct vnode **vpp;
 	struct mbuf **mdp;
 	caddr_t *dposp;
 	struct vattr *vaper;
+	int dontshrink;
 {
 	register struct vnode *vp = *vpp;
 	register struct vattr *vap;
@@ -1323,9 +1324,18 @@ nfs_loadattrcache(vpp, mdp, dposp, vaper)
 		vap->va_gen = fxdr_unsigned(u_int32_t,fp->fa2_ctime.nfsv2_usec);
 		vap->va_filerev = 0;
 	}
+	np->n_attrstamp = time_second;
 	if (vap->va_size != np->n_size) {
 		if (vap->va_type == VREG) {
-			if (np->n_flag & NMODIFIED) {
+			if (dontshrink && vap->va_size < np->n_size) {
+				/*
+				 * We've been told not to shrink the file;
+				 * zero np->n_attrstamp to indicate that
+				 * the attributes are stale.
+				 */
+				vap->va_size = np->n_size;
+				np->n_attrstamp = 0;
+			} else if (np->n_flag & NMODIFIED) {
 				if (vap->va_size < np->n_size)
 					vap->va_size = np->n_size;
 				else
@@ -1338,7 +1348,6 @@ nfs_loadattrcache(vpp, mdp, dposp, vaper)
 			np->n_size = vap->va_size;
 		}
 	}
-	np->n_attrstamp = time_second;
 	if (vaper != NULL) {
 		bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(*vap));
 		if (np->n_flag & NCHG) {
diff --git a/sys/nfsserver/nfsm_subs.h b/sys/nfsserver/nfsm_subs.h
index b13c0099b816..0990fe4e0121 100644
--- a/sys/nfsserver/nfsm_subs.h
+++ b/sys/nfsserver/nfsm_subs.h
@@ -212,7 +212,7 @@ struct mbuf *nfsm_rpchead __P((struct ucred *cr, int nmflag, int procid,
 #define	nfsm_loadattr(v, a) \
 	do { \
 		struct vnode *ttvp = (v); \
-		if ((t1 = nfs_loadattrcache(&ttvp, &md, &dpos, (a))) != 0) { \
+		if ((t1 = nfs_loadattrcache(&ttvp, &md, &dpos, (a), 0)) != 0) { \
 			error = t1; \
 			m_freem(mrep); \
 			goto nfsmout; \
@@ -226,7 +226,7 @@ struct mbuf *nfsm_rpchead __P((struct ucred *cr, int nmflag, int procid,
 		nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \
 		if (((f) = fxdr_unsigned(int, *tl)) != 0) { \
 			if ((t1 = nfs_loadattrcache(&ttvp, &md, &dpos, \
-				(struct vattr *)0)) != 0) { \
+				(struct vattr *)0, 1)) != 0) { \
 				error = t1; \
 				(f) = 0; \
 				m_freem(mrep); \
diff --git a/sys/nfsserver/nfsrvstats.h b/sys/nfsserver/nfsrvstats.h
index e07a4f5315d1..5c5a8237f13f 100644
--- a/sys/nfsserver/nfsrvstats.h
+++ b/sys/nfsserver/nfsrvstats.h
@@ -616,7 +616,7 @@ int	nfs_request __P((struct vnode *, struct mbuf *, int, struct proc *,
 			 struct ucred *, struct mbuf **, struct mbuf **,
 			 caddr_t *));
 int	nfs_loadattrcache __P((struct vnode **, struct mbuf **, caddr_t *,
-			       struct vattr *));
+			       struct vattr *, int));
 int	nfs_namei __P((struct nameidata *, fhandle_t *, int,
 		       struct nfssvc_sock *, struct sockaddr *, struct mbuf **,
 		       caddr_t *, struct vnode **, struct proc *, int, int));