Revert "performance/write-behind: better invalidation in readdirp"

This reverts commit 4d3c62e71f3250f10aa0344085a5ec2d45458d5c.

Traversing all children of a directory in wb_readdirp caused
significant performance regression. Hence reverting this patch

Change-Id: I6c3b6cee2dd2aca41d49fe55ecdc6262e7cc5f34
updates: bz#1512691
Signed-off-by: Raghavendra G <rgowdapp@redhat.com>

2 files changed, 1 insertions, 8 deletions

diff --git a/libglusterfs/src/inode.c b/libglusterfs/src/inode.c
index 488486f35b8..11814d52d7c 100644
--- a/libglusterfs/src/inode.c
+++ b/libglusterfs/src/inode.c
@@ -132,7 +132,6 @@ __dentry_unset (dentry_t *dentry)
         __dentry_unhash (dentry);
 
         list_del_init (&dentry->inode_list);
-        list_del_init (&dentry->parent_list);
 
         GF_FREE (dentry->name);
         dentry->name = NULL;
@@ -142,7 +141,6 @@ __dentry_unset (dentry_t *dentry)
                 dentry->parent = NULL;
         }
 
-        dentry->inode = NULL;
         mem_put (dentry);
 }
 
@@ -606,7 +604,6 @@ __dentry_create (inode_t *inode, inode_t *parent, const char *name)
 
         INIT_LIST_HEAD (&newd->inode_list);
         INIT_LIST_HEAD (&newd->hash);
-        INIT_LIST_HEAD (&newd->parent_list);
 
         newd->name = gf_strdup (name);
         if (newd->name == NULL) {
@@ -619,9 +616,8 @@ __dentry_create (inode_t *inode, inode_t *parent, const char *name)
                 newd->parent = __inode_ref (parent);
 
         list_add (&newd->inode_list, &inode->dentry_list);
-        list_add (&newd->parent_list, &parent->children);
-
         newd->inode = inode;
+
 out:
         return newd;
 }
@@ -652,7 +648,6 @@ __inode_create (inode_table_t *table)
         INIT_LIST_HEAD (&newi->list);
         INIT_LIST_HEAD (&newi->hash);
         INIT_LIST_HEAD (&newi->dentry_list);
-        INIT_LIST_HEAD (&newi->children);
 
         newi->_ctx = GF_CALLOC (1,
                                 (sizeof (struct _inode_ctx) * table->ctxcount),
diff --git a/libglusterfs/src/inode.h b/libglusterfs/src/inode.h
index 96f67c05629..658477700c0 100644
--- a/libglusterfs/src/inode.h
+++ b/libglusterfs/src/inode.h
@@ -60,7 +60,6 @@ struct _inode_table {
 struct _dentry {
         struct list_head   inode_list;   /* list of dentries of inode */
         struct list_head   hash;         /* hash table pointers */
-        struct list_head   parent_list;  /* list of parent's children */
         inode_t           *inode;        /* inode of this directory entry */
         char              *name;         /* name of the directory entry */
         inode_t           *parent;       /* directory of the entry */
@@ -100,7 +99,6 @@ struct _inode {
         struct list_head     dentry_list;   /* list of directory entries for this inode */
         struct list_head     hash;          /* hash table pointers */
         struct list_head     list;          /* active/lru/purge */
-        struct list_head     children;      /* list of children */
 
         struct _inode_ctx   *_ctx;    /* replacement for dict_t *(inode->ctx) */
 };