Try using machine credentials for RENEW calls

[pandora-kernel.git] / fs / dcache.c

diff --git a/fs/dcache.c b/fs/dcache.c
index 3c6d311..16a53cc 100644 (file)
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -243,6 +243,7 @@ static void dentry_lru_add(struct dentry *dentry)
 static void __dentry_lru_del(struct dentry *dentry)
 {
        list_del_init(&dentry->d_lru);
+       dentry->d_flags &= ~DCACHE_SHRINK_LIST;
        dentry->d_sb->s_nr_dentry_unused--;
        dentry_stat.nr_unused--;
 }
@@ -806,6 +807,7 @@ relock:
                        spin_unlock(&dentry->d_lock);
                } else {
                        list_move_tail(&dentry->d_lru, &tmp);
+                       dentry->d_flags |= DCACHE_SHRINK_LIST;
                        spin_unlock(&dentry->d_lock);
                        if (!--count)
                                break;
@@ -1097,14 +1099,19 @@ resume:
 
                /*
                 * move only zero ref count dentries to the dispose list.
+                *
+                * Those which are presently on the shrink list, being processed
+                * by shrink_dentry_list(), shouldn't be moved.  Otherwise the
+                * loop in shrink_dcache_parent() might not make any progress
+                * and loop forever.
                 */
-               if (!dentry->d_count) {
+               if (dentry->d_count) {
+                       dentry_lru_del(dentry);
+               } else if (!(dentry->d_flags & DCACHE_SHRINK_LIST)) {
                        dentry_lru_move_list(dentry, dispose);
+                       dentry->d_flags |= DCACHE_SHRINK_LIST;
                        found++;
-               } else {
-                       dentry_lru_del(dentry);
                }
-
                /*
                 * We can return to the caller if we have found some (this
                 * ensures forward progress). We'll be coming back to find
@@ -1468,7 +1475,14 @@ static struct dentry * __d_find_any_alias(struct inode *inode)
        return alias;
 }
 
-static struct dentry * d_find_any_alias(struct inode *inode)
+/**
+ * d_find_any_alias - find any alias for a given inode
+ * @inode: inode to find an alias for
+ *
+ * If any aliases exist for the given inode, take and return a
+ * reference for one of them.  If no aliases exist, return %NULL.
+ */
+struct dentry *d_find_any_alias(struct inode *inode)
 {
        struct dentry *de;
 
@@ -1477,7 +1491,7 @@ static struct dentry * d_find_any_alias(struct inode *inode)
        spin_unlock(&inode->i_lock);
        return de;
 }
-
+EXPORT_SYMBOL(d_find_any_alias);
 
 /**
  * d_obtain_alias - find or allocate a dentry for a given inode