[PATCH 2/5] vfs: d_genocide() doesnt add dentries to unused list

[jblunck@suse.de]

[-- Attachment #1: patches.jbl/vfs-d_genocide-fix.diff --]
[-- Type: text/plain, Size: 1188 bytes --]

Calling d_genocide() is only lowering the reference count of the dentries but
doesn't add them to the unused list.

Signed-off-by: Jan Blunck <jblunck@suse.de>
---
 fs/dcache.c |   18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)

Index: work-2.6/fs/dcache.c
===================================================================
--- work-2.6.orig/fs/dcache.c
+++ work-2.6/fs/dcache.c
@@ -1612,11 +1612,25 @@ resume:
 			this_parent = dentry;
 			goto repeat;
 		}
-		atomic_dec(&dentry->d_count);
+		if (!list_empty(&dentry->d_lru)) {
+			dentry_stat.nr_unused--;
+			list_del_init(&dentry->d_lru);
+		}
+		if (atomic_dec_and_test(&dentry->d_count)) {
+			list_add(&dentry->d_lru, dentry_unused.prev);
+			dentry_stat.nr_unused++;
+		}
 	}
 	if (this_parent != root) {
 		next = this_parent->d_u.d_child.next;
-		atomic_dec(&this_parent->d_count);
+		if (!list_empty(&this_parent->d_lru)) {
+			dentry_stat.nr_unused--;
+			list_del_init(&this_parent->d_lru);
+		}
+		if (atomic_dec_and_test(&this_parent->d_count)) {
+			list_add(&this_parent->d_lru, dentry_unused.prev);
+			dentry_stat.nr_unused++;
+		}
 		this_parent = this_parent->d_parent;
 		goto resume;
 	}