diff -urNp x-ref/fs/nfsd/nfscache.c x/fs/nfsd/nfscache.c
--- x-ref/fs/nfsd/nfscache.c	2002-11-29 02:23:16.000000000 +0100
+++ x/fs/nfsd/nfscache.c	2002-12-02 18:46:47.000000000 +0100
@@ -39,6 +39,7 @@ static struct svc_cacherep *	lru_head;
 static struct svc_cacherep *	lru_tail;
 static struct svc_cacherep *	nfscache;
 static int			cache_disabled = 1;
+static spinlock_t		cache_lock = SPIN_LOCK_UNLOCKED;
 
 static int	nfsd_cache_append(struct svc_rqst *rqstp, struct svc_buf *data);
 
@@ -178,6 +179,8 @@ nfsd_cache_lookup(struct svc_rqst *rqstp
 		return RC_DOIT;
 	}
 
+	spin_lock(&cache_lock);
+
 	rp = rh = (struct svc_cacherep *) &hash_list[REQHASH(xid)];
 	while ((rp = rp->c_hash_next) != rh) {
 		if (rp->c_state != RC_UNUSED &&
@@ -185,6 +188,8 @@ nfsd_cache_lookup(struct svc_rqst *rqstp
 		    proto == rp->c_prot && vers == rp->c_vers &&
 		    time_before(jiffies, rp->c_timestamp + 120*HZ) &&
 		    memcmp((char*)&rqstp->rq_addr, (char*)&rp->c_addr, sizeof(rp->c_addr))==0) {
+			lru_put_front(rp);
+			spin_unlock(&cache_lock);
 			nfsdstats.rchits++;
 			goto found_entry;
 		}
@@ -200,6 +205,7 @@ nfsd_cache_lookup(struct svc_rqst *rqstp
 		if (safe++ > CACHESIZE) {
 			printk("nfsd: loop in repcache LRU list\n");
 			cache_disabled = 1;
+			spin_unlock(&cache_lock);
 			return RC_DOIT;
 		}
 	}
@@ -214,6 +220,7 @@ nfsd_cache_lookup(struct svc_rqst *rqstp
 			printk(KERN_WARNING "nfsd: disabling repcache.\n");
 			cache_disabled = 1;
 		}
+		spin_unlock(&cache_lock);
 		return RC_DOIT;
 	}
 
@@ -227,6 +234,7 @@ nfsd_cache_lookup(struct svc_rqst *rqstp
 	rp->c_timestamp = jiffies;
 
 	hash_refile(rp);
+	spin_unlock(&cache_lock);
 
 	/* release any buffer */
 	if (rp->c_type == RC_REPLBUFF) {
@@ -241,7 +249,6 @@ found_entry:
 	/* We found a matching entry which is either in progress or done. */
 	age = jiffies - rp->c_timestamp;
 	rp->c_timestamp = jiffies;
-	lru_put_front(rp);
 
 	/* Request being processed or excessive rexmits */
 	if (rp->c_state == RC_INPROG || age < RC_DELAY)
@@ -324,11 +331,13 @@ nfsd_cache_update(struct svc_rqst *rqstp
 		break;
 	}
 
+	spin_lock(&cache_lock);
 	lru_put_front(rp);
 	rp->c_secure = rqstp->rq_secure;
 	rp->c_type = cachetype;
 	rp->c_state = RC_DONE;
 	rp->c_timestamp = jiffies;
+	spin_unlock(&cache_lock);
 
 	return;
 }