1 files changed, 53 insertions, 0 deletions
diff --git a/debian/patches/tmpfs-improve-diskfs_node_iterate.patch b/debian/patches/tmpfs-improve-diskfs_node_iterate.patch
new file mode 100644
index 00000000..fbb013bd
--- /dev/null
+++ b/debian/patches/tmpfs-improve-diskfs_node_iterate.patch
@@ -0,0 +1,53 @@
+commit 328d69406ec81b4b8248f46fafa205c6745ef083
+Author: Justus Winter <4winter@informatik.uni-hamburg.de>
+Date:   Wed Apr 30 02:08:41 2014 +0200
+
+    tmpfs: improve diskfs_node_iterate
+    
+    Currently, diskfs_node_iterate iterates twice over all nodes.  The
+    first time only to determine the number of nodes currently in the
+    cache.  Simply count them instead.
+    
+    * tmpfs/node.c (all_nodes_nr_items): New variable.
+    (diskfs_node_norefs): Decrement all_nodes_nr_items.
+    (diskfs_cached_lookup): Increment all_nodes_nr_items.
+    (diskfs_node_iterate): Fix the type of num_nodes, use all_nodes_nr_items.
+
+diff --git a/tmpfs/node.c b/tmpfs/node.c
+index bc0ad64..3925d00 100644
+--- a/tmpfs/node.c
++++ b/tmpfs/node.c
+@@ -30,6 +30,7 @@ unsigned int num_files;
+ static unsigned int gen;
+ 
+ struct node *all_nodes;
++static size_t all_nodes_nr_items;
+ 
+ error_t
+ diskfs_alloc_node (struct node *dp, mode_t mode, struct node **npp)
+@@ -122,6 +123,7 @@ diskfs_node_norefs (struct node *np)
+ 	np->dn->hnext->dn->hprevp = np->dn->hprevp;
+       np->dn->hnext = 0;
+       np->dn->hprevp = 0;
++      all_nodes_nr_items -= 1;
+     }
+ 
+   free (np);
+@@ -186,6 +188,7 @@ diskfs_cached_lookup (ino_t inum, struct node **npp)
+ 	dn->hnext->dn->hprevp = &dn->hnext;
+       dn->hprevp = &all_nodes;
+       all_nodes = np;
++      all_nodes_nr_items += 1;
+       pthread_spin_unlock (&diskfs_node_refcnt_lock);
+ 
+       st = &np->dn_stat;
+@@ -233,8 +236,7 @@ diskfs_node_iterate (error_t (*fun) (struct node *))
+      diskfs_node_refcnt_lock, but we can't hold this while locking the
+      individual node locks).  */
+ 
+-  for (node = all_nodes; node != 0; node = node->dn->hnext)
+-    num_nodes++;
++  num_nodes = all_nodes_nr_items;
+ 
+   p = node_list = alloca (num_nodes * sizeof (struct node *));
+   for (node = all_nodes; node != 0; node = node->dn->hnext)