DLPX-74216 nfs-server restarts fail when order-5 allocations are exhausted (#3)

Author: Don Brady

fs/nfsd/filecache.c

@@ -579,8 +579,8 @@ nfsd_file_cache_init(void)
 	if (nfsd_file_hashtbl)
 		return 0;
 
-	nfsd_file_hashtbl = kcalloc(NFSD_FILE_HASH_SIZE,
-				sizeof(*nfsd_file_hashtbl), GFP_KERNEL);
+	nfsd_file_hashtbl = kvzalloc(array_size(NFSD_FILE_HASH_SIZE,
+				sizeof(*nfsd_file_hashtbl)), GFP_KERNEL);
 	if (!nfsd_file_hashtbl) {
 		pr_err("nfsd: unable to allocate nfsd_file_hashtbl\n");
 		goto out_err;
@@ -646,7 +646,7 @@ nfsd_file_cache_init(void)
 	nfsd_file_slab = NULL;
 	kmem_cache_destroy(nfsd_file_mark_slab);
 	nfsd_file_mark_slab = NULL;
-	kfree(nfsd_file_hashtbl);
+	kvfree(nfsd_file_hashtbl);
 	nfsd_file_hashtbl = NULL;
 	goto out;
 }
@@ -710,7 +710,7 @@ nfsd_file_cache_shutdown(void)
 	fsnotify_wait_marks_destroyed();
 	kmem_cache_destroy(nfsd_file_mark_slab);
 	nfsd_file_mark_slab = NULL;
-	kfree(nfsd_file_hashtbl);
+	kvfree(nfsd_file_hashtbl);
 	nfsd_file_hashtbl = NULL;
 }