From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Fri, 22 Jul 2011 20:16:07 +0000 (-0700)
Subject: Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/dlm
X-Git-Tag: v3.1-rc1~323
X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?p=pandora-kernel.git;a=commitdiff_plain;h=6aaf4404ab2efff2f2f3ee4a5bb5379c1c8092b3;hp=ba1f9db908a9ac4038f6b694de3e55959886258d

Merge branch 'for-linus' of git://git./linux/kernel/git/teigland/dlm

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/dlm:
  dlm: don't limit active work items
  dlm: use workqueue for callbacks
  dlm: remove deadlock debug print
  dlm: improve rsb searches
  dlm: keep lkbs in idr
  dlm: fix kmalloc args
  dlm: don't do pointless NULL check, use kzalloc and fix order of arguments
  dlm: dump address of unknown node
  dlm: use vmalloc for hash tables
  dlm: show addresses in configfs
---

diff --git a/fs/dlm/ast.c b/fs/dlm/ast.c
index abc49f292454..90e5997262ea 100644
--- a/fs/dlm/ast.c
+++ b/fs/dlm/ast.c
@@ -14,17 +14,9 @@
 #include "dlm_internal.h"
 #include "lock.h"
 #include "user.h"
-#include "ast.h"
-
-#define WAKE_ASTS  0
-
-static uint64_t			ast_seq_count;
-static struct list_head		ast_queue;
-static spinlock_t		ast_queue_lock;
-static struct task_struct *	astd_task;
-static unsigned long		astd_wakeflags;
-static struct mutex		astd_running;
 
+static uint64_t			dlm_cb_seq;
+static spinlock_t		dlm_cb_seq_spin;
 
 static void dlm_dump_lkb_callbacks(struct dlm_lkb *lkb)
 {
@@ -57,21 +49,13 @@ static void dlm_dump_lkb_callbacks(struct dlm_lkb *lkb)
 	}
 }
 
-void dlm_del_ast(struct dlm_lkb *lkb)
-{
-	spin_lock(&ast_queue_lock);
-	if (!list_empty(&lkb->lkb_astqueue))
-		list_del_init(&lkb->lkb_astqueue);
-	spin_unlock(&ast_queue_lock);
-}
-
 int dlm_add_lkb_callback(struct dlm_lkb *lkb, uint32_t flags, int mode,
 			 int status, uint32_t sbflags, uint64_t seq)
 {
 	struct dlm_ls *ls = lkb->lkb_resource->res_ls;
 	uint64_t prev_seq;
 	int prev_mode;
-	int i;
+	int i, rv;
 
 	for (i = 0; i < DLM_CALLBACKS_SIZE; i++) {
 		if (lkb->lkb_callbacks[i].seq)
@@ -100,7 +84,8 @@ int dlm_add_lkb_callback(struct dlm_lkb *lkb, uint32_t flags, int mode,
 					  mode,
 					  (unsigned long long)prev_seq,
 					  prev_mode);
-				return 0;
+				rv = 0;
+				goto out;
 			}
 		}
 
@@ -109,6 +94,7 @@ int dlm_add_lkb_callback(struct dlm_lkb *lkb, uint32_t flags, int mode,
 		lkb->lkb_callbacks[i].mode = mode;
 		lkb->lkb_callbacks[i].sb_status = status;
 		lkb->lkb_callbacks[i].sb_flags = (sbflags & 0x000000FF);
+		rv = 0;
 		break;
 	}
 
@@ -117,21 +103,24 @@ int dlm_add_lkb_callback(struct dlm_lkb *lkb, uint32_t flags, int mode,
 			  lkb->lkb_id, (unsigned long long)seq,
 			  flags, mode, status, sbflags);
 		dlm_dump_lkb_callbacks(lkb);
-		return -1;
+		rv = -1;
+		goto out;
 	}
-
-	return 0;
+ out:
+	return rv;
 }
 
 int dlm_rem_lkb_callback(struct dlm_ls *ls, struct dlm_lkb *lkb,
 			 struct dlm_callback *cb, int *resid)
 {
-	int i;
+	int i, rv;
 
 	*resid = 0;
 
-	if (!lkb->lkb_callbacks[0].seq)
-		return -ENOENT;
+	if (!lkb->lkb_callbacks[0].seq) {
+		rv = -ENOENT;
+		goto out;
+	}
 
 	/* oldest undelivered cb is callbacks[0] */
 
@@ -163,7 +152,8 @@ int dlm_rem_lkb_callback(struct dlm_ls *ls, struct dlm_lkb *lkb,
 				  cb->mode,
 				  (unsigned long long)lkb->lkb_last_cast.seq,
 				  lkb->lkb_last_cast.mode);
-			return 0;
+			rv = 0;
+			goto out;
 		}
 	}
 
@@ -176,171 +166,150 @@ int dlm_rem_lkb_callback(struct dlm_ls *ls, struct dlm_lkb *lkb,
 		memcpy(&lkb->lkb_last_bast, cb, sizeof(struct dlm_callback));
 		lkb->lkb_last_bast_time = ktime_get();
 	}
-
-	return 0;
+	rv = 0;
+ out:
+	return rv;
 }
 
-void dlm_add_ast(struct dlm_lkb *lkb, uint32_t flags, int mode, int status,
-		 uint32_t sbflags)
+void dlm_add_cb(struct dlm_lkb *lkb, uint32_t flags, int mode, int status,
+		uint32_t sbflags)
 {
-	uint64_t seq;
+	struct dlm_ls *ls = lkb->lkb_resource->res_ls;
+	uint64_t new_seq, prev_seq;
 	int rv;
 
-	spin_lock(&ast_queue_lock);
-
-	seq = ++ast_seq_count;
+	spin_lock(&dlm_cb_seq_spin);
+	new_seq = ++dlm_cb_seq;
+	spin_unlock(&dlm_cb_seq_spin);
 
 	if (lkb->lkb_flags & DLM_IFL_USER) {
-		spin_unlock(&ast_queue_lock);
-		dlm_user_add_ast(lkb, flags, mode, status, sbflags, seq);
+		dlm_user_add_ast(lkb, flags, mode, status, sbflags, new_seq);
 		return;
 	}
 
-	rv = dlm_add_lkb_callback(lkb, flags, mode, status, sbflags, seq);
-	if (rv < 0) {
-		spin_unlock(&ast_queue_lock);
-		return;
-	}
+	mutex_lock(&lkb->lkb_cb_mutex);
+	prev_seq = lkb->lkb_callbacks[0].seq;
 
-	if (list_empty(&lkb->lkb_astqueue)) {
+	rv = dlm_add_lkb_callback(lkb, flags, mode, status, sbflags, new_seq);
+	if (rv < 0)
+		goto out;
+
+	if (!prev_seq) {
 		kref_get(&lkb->lkb_ref);
-		list_add_tail(&lkb->lkb_astqueue, &ast_queue);
-	}
-	spin_unlock(&ast_queue_lock);
 
-	set_bit(WAKE_ASTS, &astd_wakeflags);
-	wake_up_process(astd_task);
+		if (test_bit(LSFL_CB_DELAY, &ls->ls_flags)) {
+			mutex_lock(&ls->ls_cb_mutex);
+			list_add(&lkb->lkb_cb_list, &ls->ls_cb_delay);
+			mutex_unlock(&ls->ls_cb_mutex);
+		} else {
+			queue_work(ls->ls_callback_wq, &lkb->lkb_cb_work);
+		}
+	}
+ out:
+	mutex_unlock(&lkb->lkb_cb_mutex);
 }
 
-static void process_asts(void)
+void dlm_callback_work(struct work_struct *work)
 {
-	struct dlm_ls *ls = NULL;
-	struct dlm_rsb *r = NULL;
-	struct dlm_lkb *lkb;
+	struct dlm_lkb *lkb = container_of(work, struct dlm_lkb, lkb_cb_work);
+	struct dlm_ls *ls = lkb->lkb_resource->res_ls;
 	void (*castfn) (void *astparam);
 	void (*bastfn) (void *astparam, int mode);
 	struct dlm_callback callbacks[DLM_CALLBACKS_SIZE];
 	int i, rv, resid;
 
-repeat:
-	spin_lock(&ast_queue_lock);
-	list_for_each_entry(lkb, &ast_queue, lkb_astqueue) {
-		r = lkb->lkb_resource;
-		ls = r->res_ls;
+	memset(&callbacks, 0, sizeof(callbacks));
 
-		if (dlm_locking_stopped(ls))
-			continue;
-
-		/* we remove from astqueue list and remove everything in
-		   lkb_callbacks before releasing the spinlock so empty
-		   lkb_astqueue is always consistent with empty lkb_callbacks */
-
-		list_del_init(&lkb->lkb_astqueue);
-
-		castfn = lkb->lkb_astfn;
-		bastfn = lkb->lkb_bastfn;
+	mutex_lock(&lkb->lkb_cb_mutex);
+	if (!lkb->lkb_callbacks[0].seq) {
+		/* no callback work exists, shouldn't happen */
+		log_error(ls, "dlm_callback_work %x no work", lkb->lkb_id);
+		dlm_print_lkb(lkb);
+		dlm_dump_lkb_callbacks(lkb);
+	}
 
-		memset(&callbacks, 0, sizeof(callbacks));
+	for (i = 0; i < DLM_CALLBACKS_SIZE; i++) {
+		rv = dlm_rem_lkb_callback(ls, lkb, &callbacks[i], &resid);
+		if (rv < 0)
+			break;
+	}
 
-		for (i = 0; i < DLM_CALLBACKS_SIZE; i++) {
-			rv = dlm_rem_lkb_callback(ls, lkb, &callbacks[i], &resid);
-			if (rv < 0)
-				break;
-		}
-		spin_unlock(&ast_queue_lock);
+	if (resid) {
+		/* cbs remain, loop should have removed all, shouldn't happen */
+		log_error(ls, "dlm_callback_work %x resid %d", lkb->lkb_id,
+			  resid);
+		dlm_print_lkb(lkb);
+		dlm_dump_lkb_callbacks(lkb);
+	}
+	mutex_unlock(&lkb->lkb_cb_mutex);
 
-		if (resid) {
-			/* shouldn't happen, for loop should have removed all */
-			log_error(ls, "callback resid %d lkb %x",
-				  resid, lkb->lkb_id);
-		}
+	castfn = lkb->lkb_astfn;
+	bastfn = lkb->lkb_bastfn;
 
-		for (i = 0; i < DLM_CALLBACKS_SIZE; i++) {
-			if (!callbacks[i].seq)
-				break;
-			if (callbacks[i].flags & DLM_CB_SKIP) {
-				continue;
-			} else if (callbacks[i].flags & DLM_CB_BAST) {
-				bastfn(lkb->lkb_astparam, callbacks[i].mode);
-			} else if (callbacks[i].flags & DLM_CB_CAST) {
-				lkb->lkb_lksb->sb_status = callbacks[i].sb_status;
-				lkb->lkb_lksb->sb_flags = callbacks[i].sb_flags;
-				castfn(lkb->lkb_astparam);
-			}
+	for (i = 0; i < DLM_CALLBACKS_SIZE; i++) {
+		if (!callbacks[i].seq)
+			break;
+		if (callbacks[i].flags & DLM_CB_SKIP) {
+			continue;
+		} else if (callbacks[i].flags & DLM_CB_BAST) {
+			bastfn(lkb->lkb_astparam, callbacks[i].mode);
+		} else if (callbacks[i].flags & DLM_CB_CAST) {
+			lkb->lkb_lksb->sb_status = callbacks[i].sb_status;
+			lkb->lkb_lksb->sb_flags = callbacks[i].sb_flags;
+			castfn(lkb->lkb_astparam);
 		}
-
-		/* removes ref for ast_queue, may cause lkb to be freed */
-		dlm_put_lkb(lkb);
-
-		cond_resched();
-		goto repeat;
 	}
-	spin_unlock(&ast_queue_lock);
-}
-
-static inline int no_asts(void)
-{
-	int ret;
 
-	spin_lock(&ast_queue_lock);
-	ret = list_empty(&ast_queue);
-	spin_unlock(&ast_queue_lock);
-	return ret;
+	/* undo kref_get from dlm_add_callback, may cause lkb to be freed */
+	dlm_put_lkb(lkb);
 }
 
-static int dlm_astd(void *data)
+int dlm_callback_start(struct dlm_ls *ls)
 {
-	while (!kthread_should_stop()) {
-		set_current_state(TASK_INTERRUPTIBLE);
-		if (!test_bit(WAKE_ASTS, &astd_wakeflags))
-			schedule();
-		set_current_state(TASK_RUNNING);
-
-		mutex_lock(&astd_running);
-		if (test_and_clear_bit(WAKE_ASTS, &astd_wakeflags))
-			process_asts();
-		mutex_unlock(&astd_running);
+	ls->ls_callback_wq = alloc_workqueue("dlm_callback",
+					     WQ_UNBOUND |
+					     WQ_MEM_RECLAIM |
+					     WQ_NON_REENTRANT,
+					     0);
+	if (!ls->ls_callback_wq) {
+		log_print("can't start dlm_callback workqueue");
+		return -ENOMEM;
 	}
 	return 0;
 }
 
-void dlm_astd_wake(void)
+void dlm_callback_stop(struct dlm_ls *ls)
 {
-	if (!no_asts()) {
-		set_bit(WAKE_ASTS, &astd_wakeflags);
-		wake_up_process(astd_task);
-	}
+	if (ls->ls_callback_wq)
+		destroy_workqueue(ls->ls_callback_wq);
 }
 
-int dlm_astd_start(void)
+void dlm_callback_suspend(struct dlm_ls *ls)
 {
-	struct task_struct *p;
-	int error = 0;
-
-	INIT_LIST_HEAD(&ast_queue);
-	spin_lock_init(&ast_queue_lock);
-	mutex_init(&astd_running);
-
-	p = kthread_run(dlm_astd, NULL, "dlm_astd");
-	if (IS_ERR(p))
-		error = PTR_ERR(p);
-	else
-		astd_task = p;
-	return error;
-}
+	set_bit(LSFL_CB_DELAY, &ls->ls_flags);
 
-void dlm_astd_stop(void)
-{
-	kthread_stop(astd_task);
+	if (ls->ls_callback_wq)
+		flush_workqueue(ls->ls_callback_wq);
 }
 
-void dlm_astd_suspend(void)
+void dlm_callback_resume(struct dlm_ls *ls)
 {
-	mutex_lock(&astd_running);
-}
+	struct dlm_lkb *lkb, *safe;
+	int count = 0;
 
-void dlm_astd_resume(void)
-{
-	mutex_unlock(&astd_running);
+	clear_bit(LSFL_CB_DELAY, &ls->ls_flags);
+
+	if (!ls->ls_callback_wq)
+		return;
+
+	mutex_lock(&ls->ls_cb_mutex);
+	list_for_each_entry_safe(lkb, safe, &ls->ls_cb_delay, lkb_cb_list) {
+		list_del_init(&lkb->lkb_cb_list);
+		queue_work(ls->ls_callback_wq, &lkb->lkb_cb_work);
+		count++;
+	}
+	mutex_unlock(&ls->ls_cb_mutex);
+
+	log_debug(ls, "dlm_callback_resume %d", count);
 }
 
diff --git a/fs/dlm/ast.h b/fs/dlm/ast.h
index 8aa89c9b5611..757b551c6820 100644
--- a/fs/dlm/ast.h
+++ b/fs/dlm/ast.h
@@ -18,14 +18,15 @@ int dlm_add_lkb_callback(struct dlm_lkb *lkb, uint32_t flags, int mode,
                          int status, uint32_t sbflags, uint64_t seq);
 int dlm_rem_lkb_callback(struct dlm_ls *ls, struct dlm_lkb *lkb,
                          struct dlm_callback *cb, int *resid);
-void dlm_add_ast(struct dlm_lkb *lkb, uint32_t flags, int mode, int status,
-		 uint32_t sbflags);
+void dlm_add_cb(struct dlm_lkb *lkb, uint32_t flags, int mode, int status,
+                uint32_t sbflags);
 
-void dlm_astd_wake(void);
-int dlm_astd_start(void);
-void dlm_astd_stop(void);
-void dlm_astd_suspend(void);
-void dlm_astd_resume(void);
+void dlm_callback_work(struct work_struct *work);
+int dlm_callback_start(struct dlm_ls *ls);
+void dlm_callback_stop(struct dlm_ls *ls);
+void dlm_callback_suspend(struct dlm_ls *ls);
+void dlm_callback_resume(struct dlm_ls *ls);
 
 #endif
 
+
diff --git a/fs/dlm/config.c b/fs/dlm/config.c
index 9b026ea8baa9..6cf72fcc0d0c 100644
--- a/fs/dlm/config.c
+++ b/fs/dlm/config.c
@@ -28,7 +28,8 @@
  * /config/dlm/<cluster>/spaces/<space>/nodes/<node>/weight
  * /config/dlm/<cluster>/comms/<comm>/nodeid
  * /config/dlm/<cluster>/comms/<comm>/local
- * /config/dlm/<cluster>/comms/<comm>/addr
+ * /config/dlm/<cluster>/comms/<comm>/addr      (write only)
+ * /config/dlm/<cluster>/comms/<comm>/addr_list (read only)
  * The <cluster> level is useless, but I haven't figured out how to avoid it.
  */
 
@@ -80,6 +81,7 @@ static ssize_t comm_local_write(struct dlm_comm *cm, const char *buf,
 				size_t len);
 static ssize_t comm_addr_write(struct dlm_comm *cm, const char *buf,
 				size_t len);
+static ssize_t comm_addr_list_read(struct dlm_comm *cm, char *buf);
 static ssize_t node_nodeid_read(struct dlm_node *nd, char *buf);
 static ssize_t node_nodeid_write(struct dlm_node *nd, const char *buf,
 				size_t len);
@@ -92,7 +94,6 @@ struct dlm_cluster {
 	unsigned int cl_tcp_port;
 	unsigned int cl_buffer_size;
 	unsigned int cl_rsbtbl_size;
-	unsigned int cl_lkbtbl_size;
 	unsigned int cl_dirtbl_size;
 	unsigned int cl_recover_timer;
 	unsigned int cl_toss_secs;
@@ -101,13 +102,13 @@ struct dlm_cluster {
 	unsigned int cl_protocol;
 	unsigned int cl_timewarn_cs;
 	unsigned int cl_waitwarn_us;
+	unsigned int cl_new_rsb_count;
 };
 
 enum {
 	CLUSTER_ATTR_TCP_PORT = 0,
 	CLUSTER_ATTR_BUFFER_SIZE,
 	CLUSTER_ATTR_RSBTBL_SIZE,
-	CLUSTER_ATTR_LKBTBL_SIZE,
 	CLUSTER_ATTR_DIRTBL_SIZE,
 	CLUSTER_ATTR_RECOVER_TIMER,
 	CLUSTER_ATTR_TOSS_SECS,
@@ -116,6 +117,7 @@ enum {
 	CLUSTER_ATTR_PROTOCOL,
 	CLUSTER_ATTR_TIMEWARN_CS,
 	CLUSTER_ATTR_WAITWARN_US,
+	CLUSTER_ATTR_NEW_RSB_COUNT,
 };
 
 struct cluster_attribute {
@@ -160,7 +162,6 @@ __CONFIGFS_ATTR(name, 0644, name##_read, name##_write)
 CLUSTER_ATTR(tcp_port, 1);
 CLUSTER_ATTR(buffer_size, 1);
 CLUSTER_ATTR(rsbtbl_size, 1);
-CLUSTER_ATTR(lkbtbl_size, 1);
 CLUSTER_ATTR(dirtbl_size, 1);
 CLUSTER_ATTR(recover_timer, 1);
 CLUSTER_ATTR(toss_secs, 1);
@@ -169,12 +170,12 @@ CLUSTER_ATTR(log_debug, 0);
 CLUSTER_ATTR(protocol, 0);
 CLUSTER_ATTR(timewarn_cs, 1);
 CLUSTER_ATTR(waitwarn_us, 0);
+CLUSTER_ATTR(new_rsb_count, 0);
 
 static struct configfs_attribute *cluster_attrs[] = {
 	[CLUSTER_ATTR_TCP_PORT] = &cluster_attr_tcp_port.attr,
 	[CLUSTER_ATTR_BUFFER_SIZE] = &cluster_attr_buffer_size.attr,
 	[CLUSTER_ATTR_RSBTBL_SIZE] = &cluster_attr_rsbtbl_size.attr,
-	[CLUSTER_ATTR_LKBTBL_SIZE] = &cluster_attr_lkbtbl_size.attr,
 	[CLUSTER_ATTR_DIRTBL_SIZE] = &cluster_attr_dirtbl_size.attr,
 	[CLUSTER_ATTR_RECOVER_TIMER] = &cluster_attr_recover_timer.attr,
 	[CLUSTER_ATTR_TOSS_SECS] = &cluster_attr_toss_secs.attr,
@@ -183,6 +184,7 @@ static struct configfs_attribute *cluster_attrs[] = {
 	[CLUSTER_ATTR_PROTOCOL] = &cluster_attr_protocol.attr,
 	[CLUSTER_ATTR_TIMEWARN_CS] = &cluster_attr_timewarn_cs.attr,
 	[CLUSTER_ATTR_WAITWARN_US] = &cluster_attr_waitwarn_us.attr,
+	[CLUSTER_ATTR_NEW_RSB_COUNT] = &cluster_attr_new_rsb_count.attr,
 	NULL,
 };
 
@@ -190,6 +192,7 @@ enum {
 	COMM_ATTR_NODEID = 0,
 	COMM_ATTR_LOCAL,
 	COMM_ATTR_ADDR,
+	COMM_ATTR_ADDR_LIST,
 };
 
 struct comm_attribute {
@@ -217,14 +220,22 @@ static struct comm_attribute comm_attr_local = {
 static struct comm_attribute comm_attr_addr = {
 	.attr   = { .ca_owner = THIS_MODULE,
                     .ca_name = "addr",
-                    .ca_mode = S_IRUGO | S_IWUSR },
+                    .ca_mode = S_IWUSR },
 	.store  = comm_addr_write,
 };
 
+static struct comm_attribute comm_attr_addr_list = {
+	.attr   = { .ca_owner = THIS_MODULE,
+                    .ca_name = "addr_list",
+                    .ca_mode = S_IRUGO },
+	.show   = comm_addr_list_read,
+};
+
 static struct configfs_attribute *comm_attrs[] = {
 	[COMM_ATTR_NODEID] = &comm_attr_nodeid.attr,
 	[COMM_ATTR_LOCAL] = &comm_attr_local.attr,
 	[COMM_ATTR_ADDR] = &comm_attr_addr.attr,
+	[COMM_ATTR_ADDR_LIST] = &comm_attr_addr_list.attr,
 	NULL,
 };
 
@@ -435,7 +446,6 @@ static struct config_group *make_cluster(struct config_group *g,
 	cl->cl_tcp_port = dlm_config.ci_tcp_port;
 	cl->cl_buffer_size = dlm_config.ci_buffer_size;
 	cl->cl_rsbtbl_size = dlm_config.ci_rsbtbl_size;
-	cl->cl_lkbtbl_size = dlm_config.ci_lkbtbl_size;
 	cl->cl_dirtbl_size = dlm_config.ci_dirtbl_size;
 	cl->cl_recover_timer = dlm_config.ci_recover_timer;
 	cl->cl_toss_secs = dlm_config.ci_toss_secs;
@@ -444,6 +454,7 @@ static struct config_group *make_cluster(struct config_group *g,
 	cl->cl_protocol = dlm_config.ci_protocol;
 	cl->cl_timewarn_cs = dlm_config.ci_timewarn_cs;
 	cl->cl_waitwarn_us = dlm_config.ci_waitwarn_us;
+	cl->cl_new_rsb_count = dlm_config.ci_new_rsb_count;
 
 	space_list = &sps->ss_group;
 	comm_list = &cms->cs_group;
@@ -720,6 +731,50 @@ static ssize_t comm_addr_write(struct dlm_comm *cm, const char *buf, size_t len)
 	return len;
 }
 
+static ssize_t comm_addr_list_read(struct dlm_comm *cm, char *buf)
+{
+	ssize_t s;
+	ssize_t allowance;
+	int i;
+	struct sockaddr_storage *addr;
+	struct sockaddr_in *addr_in;
+	struct sockaddr_in6 *addr_in6;
+	
+	/* Taken from ip6_addr_string() defined in lib/vsprintf.c */
+	char buf0[sizeof("AF_INET6	xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:255.255.255.255\n")];
+	
+
+	/* Derived from SIMPLE_ATTR_SIZE of fs/configfs/file.c */
+	allowance = 4096;
+	buf[0] = '\0';
+
+	for (i = 0; i < cm->addr_count; i++) {
+		addr = cm->addr[i];
+
+		switch(addr->ss_family) {
+		case AF_INET:
+			addr_in = (struct sockaddr_in *)addr;
+			s = sprintf(buf0, "AF_INET	%pI4\n", &addr_in->sin_addr.s_addr);
+			break;
+		case AF_INET6:
+			addr_in6 = (struct sockaddr_in6 *)addr;
+			s = sprintf(buf0, "AF_INET6	%pI6\n", &addr_in6->sin6_addr);
+			break;
+		default:
+			s = sprintf(buf0, "%s\n", "<UNKNOWN>");
+			break;
+		}
+		allowance -= s;
+		if (allowance >= 0)
+			strcat(buf, buf0);
+		else {
+			allowance += s;
+			break;
+		}
+	}
+	return 4096 - allowance;
+}
+
 static ssize_t show_node(struct config_item *i, struct configfs_attribute *a,
 			 char *buf)
 {
@@ -983,7 +1038,6 @@ int dlm_our_addr(struct sockaddr_storage *addr, int num)
 #define DEFAULT_TCP_PORT       21064
 #define DEFAULT_BUFFER_SIZE     4096
 #define DEFAULT_RSBTBL_SIZE     1024
-#define DEFAULT_LKBTBL_SIZE     1024
 #define DEFAULT_DIRTBL_SIZE     1024
 #define DEFAULT_RECOVER_TIMER      5
 #define DEFAULT_TOSS_SECS         10
@@ -992,12 +1046,12 @@ int dlm_our_addr(struct sockaddr_storage *addr, int num)
 #define DEFAULT_PROTOCOL           0
 #define DEFAULT_TIMEWARN_CS      500 /* 5 sec = 500 centiseconds */
 #define DEFAULT_WAITWARN_US	   0
+#define DEFAULT_NEW_RSB_COUNT    128
 
 struct dlm_config_info dlm_config = {
 	.ci_tcp_port = DEFAULT_TCP_PORT,
 	.ci_buffer_size = DEFAULT_BUFFER_SIZE,
 	.ci_rsbtbl_size = DEFAULT_RSBTBL_SIZE,
-	.ci_lkbtbl_size = DEFAULT_LKBTBL_SIZE,
 	.ci_dirtbl_size = DEFAULT_DIRTBL_SIZE,
 	.ci_recover_timer = DEFAULT_RECOVER_TIMER,
 	.ci_toss_secs = DEFAULT_TOSS_SECS,
@@ -1005,6 +1059,7 @@ struct dlm_config_info dlm_config = {
 	.ci_log_debug = DEFAULT_LOG_DEBUG,
 	.ci_protocol = DEFAULT_PROTOCOL,
 	.ci_timewarn_cs = DEFAULT_TIMEWARN_CS,
-	.ci_waitwarn_us = DEFAULT_WAITWARN_US
+	.ci_waitwarn_us = DEFAULT_WAITWARN_US,
+	.ci_new_rsb_count = DEFAULT_NEW_RSB_COUNT
 };
 
diff --git a/fs/dlm/config.h b/fs/dlm/config.h
index dd0ce24d5a80..3099d0dd26c0 100644
--- a/fs/dlm/config.h
+++ b/fs/dlm/config.h
@@ -20,7 +20,6 @@ struct dlm_config_info {
 	int ci_tcp_port;
 	int ci_buffer_size;
 	int ci_rsbtbl_size;
-	int ci_lkbtbl_size;
 	int ci_dirtbl_size;
 	int ci_recover_timer;
 	int ci_toss_secs;
@@ -29,6 +28,7 @@ struct dlm_config_info {
 	int ci_protocol;
 	int ci_timewarn_cs;
 	int ci_waitwarn_us;
+	int ci_new_rsb_count;
 };
 
 extern struct dlm_config_info dlm_config;
diff --git a/fs/dlm/dlm_internal.h b/fs/dlm/dlm_internal.h
index 0262451eb9c6..fe2860c02449 100644
--- a/fs/dlm/dlm_internal.h
+++ b/fs/dlm/dlm_internal.h
@@ -37,6 +37,7 @@
 #include <linux/jhash.h>
 #include <linux/miscdevice.h>
 #include <linux/mutex.h>
+#include <linux/idr.h>
 #include <asm/uaccess.h>
 
 #include <linux/dlm.h>
@@ -52,7 +53,6 @@ struct dlm_ls;
 struct dlm_lkb;
 struct dlm_rsb;
 struct dlm_member;
-struct dlm_lkbtable;
 struct dlm_rsbtable;
 struct dlm_dirtable;
 struct dlm_direntry;
@@ -108,11 +108,6 @@ struct dlm_rsbtable {
 	spinlock_t		lock;
 };
 
-struct dlm_lkbtable {
-	struct list_head	list;
-	rwlock_t		lock;
-	uint16_t		counter;
-};
 
 /*
  * Lockspace member (per node in a ls)
@@ -248,17 +243,18 @@ struct dlm_lkb {
 	int8_t			lkb_wait_count;
 	int			lkb_wait_nodeid; /* for debugging */
 
-	struct list_head	lkb_idtbl_list;	/* lockspace lkbtbl */
 	struct list_head	lkb_statequeue;	/* rsb g/c/w list */
 	struct list_head	lkb_rsb_lookup;	/* waiting for rsb lookup */
 	struct list_head	lkb_wait_reply;	/* waiting for remote reply */
-	struct list_head	lkb_astqueue;	/* need ast to be sent */
 	struct list_head	lkb_ownqueue;	/* list of locks for a process */
 	struct list_head	lkb_time_list;
 	ktime_t			lkb_timestamp;
 	ktime_t			lkb_wait_time;
 	unsigned long		lkb_timeout_cs;
 
+	struct mutex		lkb_cb_mutex;
+	struct work_struct	lkb_cb_work;
+	struct list_head	lkb_cb_list; /* for ls_cb_delay or proc->asts */
 	struct dlm_callback	lkb_callbacks[DLM_CALLBACKS_SIZE];
 	struct dlm_callback	lkb_last_cast;
 	struct dlm_callback	lkb_last_bast;
@@ -299,7 +295,7 @@ struct dlm_rsb {
 	int			res_recover_locks_count;
 
 	char			*res_lvbptr;
-	char			res_name[1];
+	char			res_name[DLM_RESNAME_MAXLEN+1];
 };
 
 /* find_rsb() flags */
@@ -465,12 +461,12 @@ struct dlm_ls {
 	unsigned long		ls_scan_time;
 	struct kobject		ls_kobj;
 
+	struct idr		ls_lkbidr;
+	spinlock_t		ls_lkbidr_spin;
+
 	struct dlm_rsbtable	*ls_rsbtbl;
 	uint32_t		ls_rsbtbl_size;
 
-	struct dlm_lkbtable	*ls_lkbtbl;
-	uint32_t		ls_lkbtbl_size;
-
 	struct dlm_dirtable	*ls_dirtbl;
 	uint32_t		ls_dirtbl_size;
 
@@ -483,6 +479,10 @@ struct dlm_ls {
 	struct mutex		ls_timeout_mutex;
 	struct list_head	ls_timeout;
 
+	spinlock_t		ls_new_rsb_spin;
+	int			ls_new_rsb_count;
+	struct list_head	ls_new_rsb;	/* new rsb structs */
+
 	struct list_head	ls_nodes;	/* current nodes in ls */
 	struct list_head	ls_nodes_gone;	/* dead node list, recovery */
 	int			ls_num_nodes;	/* number of nodes in ls */
@@ -506,8 +506,12 @@ struct dlm_ls {
 
 	struct miscdevice       ls_device;
 
+	struct workqueue_struct	*ls_callback_wq;
+
 	/* recovery related */
 
+	struct mutex		ls_cb_mutex;
+	struct list_head	ls_cb_delay; /* save for queue_work later */
 	struct timer_list	ls_timer;
 	struct task_struct	*ls_recoverd_task;
 	struct mutex		ls_recoverd_active;
@@ -544,6 +548,7 @@ struct dlm_ls {
 #define LSFL_RCOM_WAIT		4
 #define LSFL_UEVENT_WAIT	5
 #define LSFL_TIMEWARN		6
+#define LSFL_CB_DELAY		7
 
 /* much of this is just saving user space pointers associated with the
    lock that we pass back to the user lib with an ast */
diff --git a/fs/dlm/lock.c b/fs/dlm/lock.c
index f71d0b5abd95..83b5e32514e1 100644
--- a/fs/dlm/lock.c
+++ b/fs/dlm/lock.c
@@ -305,7 +305,7 @@ static void queue_cast(struct dlm_rsb *r, struct dlm_lkb *lkb, int rv)
 		rv = -EDEADLK;
 	}
 
-	dlm_add_ast(lkb, DLM_CB_CAST, lkb->lkb_grmode, rv, lkb->lkb_sbflags);
+	dlm_add_cb(lkb, DLM_CB_CAST, lkb->lkb_grmode, rv, lkb->lkb_sbflags);
 }
 
 static inline void queue_cast_overlap(struct dlm_rsb *r, struct dlm_lkb *lkb)
@@ -319,7 +319,7 @@ static void queue_bast(struct dlm_rsb *r, struct dlm_lkb *lkb, int rqmode)
 	if (is_master_copy(lkb)) {
 		send_bast(r, lkb, rqmode);
 	} else {
-		dlm_add_ast(lkb, DLM_CB_BAST, rqmode, 0, 0);
+		dlm_add_cb(lkb, DLM_CB_BAST, rqmode, 0, 0);
 	}
 }
 
@@ -327,19 +327,68 @@ static void queue_bast(struct dlm_rsb *r, struct dlm_lkb *lkb, int rqmode)
  * Basic operations on rsb's and lkb's
  */
 
-static struct dlm_rsb *create_rsb(struct dlm_ls *ls, char *name, int len)
+static int pre_rsb_struct(struct dlm_ls *ls)
+{
+	struct dlm_rsb *r1, *r2;
+	int count = 0;
+
+	spin_lock(&ls->ls_new_rsb_spin);
+	if (ls->ls_new_rsb_count > dlm_config.ci_new_rsb_count / 2) {
+		spin_unlock(&ls->ls_new_rsb_spin);
+		return 0;
+	}
+	spin_unlock(&ls->ls_new_rsb_spin);
+
+	r1 = dlm_allocate_rsb(ls);
+	r2 = dlm_allocate_rsb(ls);
+
+	spin_lock(&ls->ls_new_rsb_spin);
+	if (r1) {
+		list_add(&r1->res_hashchain, &ls->ls_new_rsb);
+		ls->ls_new_rsb_count++;
+	}
+	if (r2) {
+		list_add(&r2->res_hashchain, &ls->ls_new_rsb);
+		ls->ls_new_rsb_count++;
+	}
+	count = ls->ls_new_rsb_count;
+	spin_unlock(&ls->ls_new_rsb_spin);
+
+	if (!count)
+		return -ENOMEM;
+	return 0;
+}
+
+/* If ls->ls_new_rsb is empty, return -EAGAIN, so the caller can
+   unlock any spinlocks, go back and call pre_rsb_struct again.
+   Otherwise, take an rsb off the list and return it. */
+
+static int get_rsb_struct(struct dlm_ls *ls, char *name, int len,
+			  struct dlm_rsb **r_ret)
 {
 	struct dlm_rsb *r;
+	int count;
 
-	r = dlm_allocate_rsb(ls, len);
-	if (!r)
-		return NULL;
+	spin_lock(&ls->ls_new_rsb_spin);
+	if (list_empty(&ls->ls_new_rsb)) {
+		count = ls->ls_new_rsb_count;
+		spin_unlock(&ls->ls_new_rsb_spin);
+		log_debug(ls, "find_rsb retry %d %d %s",
+			  count, dlm_config.ci_new_rsb_count, name);
+		return -EAGAIN;
+	}
+
+	r = list_first_entry(&ls->ls_new_rsb, struct dlm_rsb, res_hashchain);
+	list_del(&r->res_hashchain);
+	ls->ls_new_rsb_count--;
+	spin_unlock(&ls->ls_new_rsb_spin);
 
 	r->res_ls = ls;
 	r->res_length = len;
 	memcpy(r->res_name, name, len);
 	mutex_init(&r->res_mutex);
 
+	INIT_LIST_HEAD(&r->res_hashchain);
 	INIT_LIST_HEAD(&r->res_lookup);
 	INIT_LIST_HEAD(&r->res_grantqueue);
 	INIT_LIST_HEAD(&r->res_convertqueue);
@@ -347,7 +396,8 @@ static struct dlm_rsb *create_rsb(struct dlm_ls *ls, char *name, int len)
 	INIT_LIST_HEAD(&r->res_root_list);
 	INIT_LIST_HEAD(&r->res_recover_list);
 
-	return r;
+	*r_ret = r;
+	return 0;
 }
 
 static int search_rsb_list(struct list_head *head, char *name, int len,
@@ -405,16 +455,6 @@ static int _search_rsb(struct dlm_ls *ls, char *name, int len, int b,
 	return error;
 }
 
-static int search_rsb(struct dlm_ls *ls, char *name, int len, int b,
-		      unsigned int flags, struct dlm_rsb **r_ret)
-{
-	int error;
-	spin_lock(&ls->ls_rsbtbl[b].lock);
-	error = _search_rsb(ls, name, len, b, flags, r_ret);
-	spin_unlock(&ls->ls_rsbtbl[b].lock);
-	return error;
-}
-
 /*
  * Find rsb in rsbtbl and potentially create/add one
  *
@@ -432,35 +472,48 @@ static int search_rsb(struct dlm_ls *ls, char *name, int len, int b,
 static int find_rsb(struct dlm_ls *ls, char *name, int namelen,
 		    unsigned int flags, struct dlm_rsb **r_ret)
 {
-	struct dlm_rsb *r = NULL, *tmp;
+	struct dlm_rsb *r = NULL;
 	uint32_t hash, bucket;
-	int error = -EINVAL;
+	int error;
 
-	if (namelen > DLM_RESNAME_MAXLEN)
+	if (namelen > DLM_RESNAME_MAXLEN) {
+		error = -EINVAL;
 		goto out;
+	}
 
 	if (dlm_no_directory(ls))
 		flags |= R_CREATE;
 
-	error = 0;
 	hash = jhash(name, namelen, 0);
 	bucket = hash & (ls->ls_rsbtbl_size - 1);
 
-	error = search_rsb(ls, name, namelen, bucket, flags, &r);
+ retry:
+	if (flags & R_CREATE) {
+		error = pre_rsb_struct(ls);
+		if (error < 0)
+			goto out;
+	}
+
+	spin_lock(&ls->ls_rsbtbl[bucket].lock);
+
+	error = _search_rsb(ls, name, namelen, bucket, flags, &r);
 	if (!error)
-		goto out;
+		goto out_unlock;
 
 	if (error == -EBADR && !(flags & R_CREATE))
-		goto out;
+		goto out_unlock;
 
 	/* the rsb was found but wasn't a master copy */
 	if (error == -ENOTBLK)
-		goto out;
+		goto out_unlock;
 
-	error = -ENOMEM;
-	r = create_rsb(ls, name, namelen);
-	if (!r)
-		goto out;
+	error = get_rsb_struct(ls, name, namelen, &r);
+	if (error == -EAGAIN) {
+		spin_unlock(&ls->ls_rsbtbl[bucket].lock);
+		goto retry;
+	}
+	if (error)
+		goto out_unlock;
 
 	r->res_hash = hash;
 	r->res_bucket = bucket;
@@ -474,18 +527,10 @@ static int find_rsb(struct dlm_ls *ls, char *name, int namelen,
 			nodeid = 0;
 		r->res_nodeid = nodeid;
 	}
-
-	spin_lock(&ls->ls_rsbtbl[bucket].lock);
-	error = _search_rsb(ls, name, namelen, bucket, 0, &tmp);
-	if (!error) {
-		spin_unlock(&ls->ls_rsbtbl[bucket].lock);
-		dlm_free_rsb(r);
-		r = tmp;
-		goto out;
-	}
 	list_add(&r->res_hashchain, &ls->ls_rsbtbl[bucket].list);
-	spin_unlock(&ls->ls_rsbtbl[bucket].lock);
 	error = 0;
+ out_unlock:
+	spin_unlock(&ls->ls_rsbtbl[bucket].lock);
  out:
 	*r_ret = r;
 	return error;
@@ -580,9 +625,8 @@ static void detach_lkb(struct dlm_lkb *lkb)
 
 static int create_lkb(struct dlm_ls *ls, struct dlm_lkb **lkb_ret)
 {
-	struct dlm_lkb *lkb, *tmp;
-	uint32_t lkid = 0;
-	uint16_t bucket;
+	struct dlm_lkb *lkb;
+	int rv, id;
 
 	lkb = dlm_allocate_lkb(ls);
 	if (!lkb)
@@ -594,60 +638,42 @@ static int create_lkb(struct dlm_ls *ls, struct dlm_lkb **lkb_ret)
 	INIT_LIST_HEAD(&lkb->lkb_ownqueue);
 	INIT_LIST_HEAD(&lkb->lkb_rsb_lookup);
 	INIT_LIST_HEAD(&lkb->lkb_time_list);
-	INIT_LIST_HEAD(&lkb->lkb_astqueue);
+	INIT_LIST_HEAD(&lkb->lkb_cb_list);
+	mutex_init(&lkb->lkb_cb_mutex);
+	INIT_WORK(&lkb->lkb_cb_work, dlm_callback_work);
 
-	get_random_bytes(&bucket, sizeof(bucket));
-	bucket &= (ls->ls_lkbtbl_size - 1);
-
-	write_lock(&ls->ls_lkbtbl[bucket].lock);
+ retry:
+	rv = idr_pre_get(&ls->ls_lkbidr, GFP_NOFS);
+	if (!rv)
+		return -ENOMEM;
 
-	/* counter can roll over so we must verify lkid is not in use */
+	spin_lock(&ls->ls_lkbidr_spin);
+	rv = idr_get_new_above(&ls->ls_lkbidr, lkb, 1, &id);
+	if (!rv)
+		lkb->lkb_id = id;
+	spin_unlock(&ls->ls_lkbidr_spin);
 
-	while (lkid == 0) {
-		lkid = (bucket << 16) | ls->ls_lkbtbl[bucket].counter++;
+	if (rv == -EAGAIN)
+		goto retry;
 
-		list_for_each_entry(tmp, &ls->ls_lkbtbl[bucket].list,
-				    lkb_idtbl_list) {
-			if (tmp->lkb_id != lkid)
-				continue;
-			lkid = 0;
-			break;
-		}
+	if (rv < 0) {
+		log_error(ls, "create_lkb idr error %d", rv);
+		return rv;
 	}
 
-	lkb->lkb_id = lkid;
-	list_add(&lkb->lkb_idtbl_list, &ls->ls_lkbtbl[bucket].list);
-	write_unlock(&ls->ls_lkbtbl[bucket].lock);
-
 	*lkb_ret = lkb;
 	return 0;
 }
 
-static struct dlm_lkb *__find_lkb(struct dlm_ls *ls, uint32_t lkid)
-{
-	struct dlm_lkb *lkb;
-	uint16_t bucket = (lkid >> 16);
-
-	list_for_each_entry(lkb, &ls->ls_lkbtbl[bucket].list, lkb_idtbl_list) {
-		if (lkb->lkb_id == lkid)
-			return lkb;
-	}
-	return NULL;
-}
-
 static int find_lkb(struct dlm_ls *ls, uint32_t lkid, struct dlm_lkb **lkb_ret)
 {
 	struct dlm_lkb *lkb;
-	uint16_t bucket = (lkid >> 16);
-
-	if (bucket >= ls->ls_lkbtbl_size)
-		return -EBADSLT;
 
-	read_lock(&ls->ls_lkbtbl[bucket].lock);
-	lkb = __find_lkb(ls, lkid);
+	spin_lock(&ls->ls_lkbidr_spin);
+	lkb = idr_find(&ls->ls_lkbidr, lkid);
 	if (lkb)
 		kref_get(&lkb->lkb_ref);
-	read_unlock(&ls->ls_lkbtbl[bucket].lock);
+	spin_unlock(&ls->ls_lkbidr_spin);
 
 	*lkb_ret = lkb;
 	return lkb ? 0 : -ENOENT;
@@ -668,12 +694,12 @@ static void kill_lkb(struct kref *kref)
 
 static int __put_lkb(struct dlm_ls *ls, struct dlm_lkb *lkb)
 {
-	uint16_t bucket = (lkb->lkb_id >> 16);
+	uint32_t lkid = lkb->lkb_id;
 
-	write_lock(&ls->ls_lkbtbl[bucket].lock);
+	spin_lock(&ls->ls_lkbidr_spin);
 	if (kref_put(&lkb->lkb_ref, kill_lkb)) {
-		list_del(&lkb->lkb_idtbl_list);
-		write_unlock(&ls->ls_lkbtbl[bucket].lock);
+		idr_remove(&ls->ls_lkbidr, lkid);
+		spin_unlock(&ls->ls_lkbidr_spin);
 
 		detach_lkb(lkb);
 
@@ -683,7 +709,7 @@ static int __put_lkb(struct dlm_ls *ls, struct dlm_lkb *lkb)
 		dlm_free_lkb(lkb);
 		return 1;
 	} else {
-		write_unlock(&ls->ls_lkbtbl[bucket].lock);
+		spin_unlock(&ls->ls_lkbidr_spin);
 		return 0;
 	}
 }
@@ -849,9 +875,7 @@ void dlm_scan_waiters(struct dlm_ls *ls)
 
 		if (!num_nodes) {
 			num_nodes = ls->ls_num_nodes;
-			warned = kmalloc(GFP_KERNEL, num_nodes * sizeof(int));
-			if (warned)
-				memset(warned, 0, num_nodes * sizeof(int));
+			warned = kzalloc(num_nodes * sizeof(int), GFP_KERNEL);
 		}
 		if (!warned)
 			continue;
@@ -863,9 +887,7 @@ void dlm_scan_waiters(struct dlm_ls *ls)
 			  dlm_config.ci_waitwarn_us, lkb->lkb_wait_nodeid);
 	}
 	mutex_unlock(&ls->ls_waiters_mutex);
-
-	if (warned)
-		kfree(warned);
+	kfree(warned);
 
 	if (debug_expired)
 		log_debug(ls, "scan_waiters %u warn %u over %d us max %lld us",
@@ -2401,9 +2423,6 @@ static int do_convert(struct dlm_rsb *r, struct dlm_lkb *lkb)
 
 	if (deadlk) {
 		/* it's left on the granted queue */
-		log_debug(r->res_ls, "deadlock %x node %d sts%d g%d r%d %s",
-			  lkb->lkb_id, lkb->lkb_nodeid, lkb->lkb_status,
-			  lkb->lkb_grmode, lkb->lkb_rqmode, r->res_name);
 		revert_lock(r, lkb);
 		queue_cast(r, lkb, -EDEADLK);
 		error = -EDEADLK;
@@ -3993,8 +4012,6 @@ static void _receive_message(struct dlm_ls *ls, struct dlm_message *ms)
 	default:
 		log_error(ls, "unknown message type %d", ms->m_type);
 	}
-
-	dlm_astd_wake();
 }
 
 /* If the lockspace is in recovery mode (locking stopped), then normal
@@ -4133,7 +4150,7 @@ void dlm_recover_waiters_pre(struct dlm_ls *ls)
 	struct dlm_message *ms_stub;
 	int wait_type, stub_unlock_result, stub_cancel_result;
 
-	ms_stub = kmalloc(GFP_KERNEL, sizeof(struct dlm_message));
+	ms_stub = kmalloc(sizeof(struct dlm_message), GFP_KERNEL);
 	if (!ms_stub) {
 		log_error(ls, "dlm_recover_waiters_pre no mem");
 		return;
@@ -4809,7 +4826,7 @@ int dlm_user_unlock(struct dlm_ls *ls, struct dlm_user_args *ua_tmp,
 		goto out_put;
 
 	spin_lock(&ua->proc->locks_spin);
-	/* dlm_user_add_ast() may have already taken lkb off the proc list */
+	/* dlm_user_add_cb() may have already taken lkb off the proc list */
 	if (!list_empty(&lkb->lkb_ownqueue))
 		list_move(&lkb->lkb_ownqueue, &ua->proc->unlocking);
 	spin_unlock(&ua->proc->locks_spin);
@@ -4946,7 +4963,7 @@ static int unlock_proc_lock(struct dlm_ls *ls, struct dlm_lkb *lkb)
 
 /* We have to release clear_proc_locks mutex before calling unlock_proc_lock()
    (which does lock_rsb) due to deadlock with receiving a message that does
-   lock_rsb followed by dlm_user_add_ast() */
+   lock_rsb followed by dlm_user_add_cb() */
 
 static struct dlm_lkb *del_proc_lock(struct dlm_ls *ls,
 				     struct dlm_user_proc *proc)
@@ -4969,7 +4986,7 @@ static struct dlm_lkb *del_proc_lock(struct dlm_ls *ls,
 	return lkb;
 }
 
-/* The ls_clear_proc_locks mutex protects against dlm_user_add_asts() which
+/* The ls_clear_proc_locks mutex protects against dlm_user_add_cb() which
    1) references lkb->ua which we free here and 2) adds lkbs to proc->asts,
    which we clear here. */
 
@@ -5011,10 +5028,10 @@ void dlm_clear_proc_locks(struct dlm_ls *ls, struct dlm_user_proc *proc)
 		dlm_put_lkb(lkb);
 	}
 
-	list_for_each_entry_safe(lkb, safe, &proc->asts, lkb_astqueue) {
+	list_for_each_entry_safe(lkb, safe, &proc->asts, lkb_cb_list) {
 		memset(&lkb->lkb_callbacks, 0,
 		       sizeof(struct dlm_callback) * DLM_CALLBACKS_SIZE);
-		list_del_init(&lkb->lkb_astqueue);
+		list_del_init(&lkb->lkb_cb_list);
 		dlm_put_lkb(lkb);
 	}
 
@@ -5053,10 +5070,10 @@ static void purge_proc_locks(struct dlm_ls *ls, struct dlm_user_proc *proc)
 	spin_unlock(&proc->locks_spin);
 
 	spin_lock(&proc->asts_spin);
-	list_for_each_entry_safe(lkb, safe, &proc->asts, lkb_astqueue) {
+	list_for_each_entry_safe(lkb, safe, &proc->asts, lkb_cb_list) {
 		memset(&lkb->lkb_callbacks, 0,
 		       sizeof(struct dlm_callback) * DLM_CALLBACKS_SIZE);
-		list_del_init(&lkb->lkb_astqueue);
+		list_del_init(&lkb->lkb_cb_list);
 		dlm_put_lkb(lkb);
 	}
 	spin_unlock(&proc->asts_spin);
diff --git a/fs/dlm/lockspace.c b/fs/dlm/lockspace.c
index 14cbf4099753..a1d8f1af144b 100644
--- a/fs/dlm/lockspace.c
+++ b/fs/dlm/lockspace.c
@@ -15,7 +15,6 @@
 #include "lockspace.h"
 #include "member.h"
 #include "recoverd.h"
-#include "ast.h"
 #include "dir.h"
 #include "lowcomms.h"
 #include "config.h"
@@ -24,6 +23,7 @@
 #include "recover.h"
 #include "requestqueue.h"
 #include "user.h"
+#include "ast.h"
 
 static int			ls_count;
 static struct mutex		ls_lock;
@@ -359,17 +359,10 @@ static int threads_start(void)
 {
 	int error;
 
-	/* Thread which process lock requests for all lockspace's */
-	error = dlm_astd_start();
-	if (error) {
-		log_print("cannot start dlm_astd thread %d", error);
-		goto fail;
-	}
-
 	error = dlm_scand_start();
 	if (error) {
 		log_print("cannot start dlm_scand thread %d", error);
-		goto astd_fail;
+		goto fail;
 	}
 
 	/* Thread for sending/receiving messages for all lockspace's */
@@ -383,8 +376,6 @@ static int threads_start(void)
 
  scand_fail:
 	dlm_scand_stop();
- astd_fail:
-	dlm_astd_stop();
  fail:
 	return error;
 }
@@ -393,7 +384,6 @@ static void threads_stop(void)
 {
 	dlm_scand_stop();
 	dlm_lowcomms_stop();
-	dlm_astd_stop();
 }
 
 static int new_lockspace(const char *name, int namelen, void **lockspace,
@@ -463,7 +453,7 @@ static int new_lockspace(const char *name, int namelen, void **lockspace,
 	size = dlm_config.ci_rsbtbl_size;
 	ls->ls_rsbtbl_size = size;
 
-	ls->ls_rsbtbl = kmalloc(sizeof(struct dlm_rsbtable) * size, GFP_NOFS);
+	ls->ls_rsbtbl = vmalloc(sizeof(struct dlm_rsbtable) * size);
 	if (!ls->ls_rsbtbl)
 		goto out_lsfree;
 	for (i = 0; i < size; i++) {
@@ -472,22 +462,13 @@ static int new_lockspace(const char *name, int namelen, void **lockspace,
 		spin_lock_init(&ls->ls_rsbtbl[i].lock);
 	}
 
-	size = dlm_config.ci_lkbtbl_size;
-	ls->ls_lkbtbl_size = size;
-
-	ls->ls_lkbtbl = kmalloc(sizeof(struct dlm_lkbtable) * size, GFP_NOFS);
-	if (!ls->ls_lkbtbl)
-		goto out_rsbfree;
-	for (i = 0; i < size; i++) {
-		INIT_LIST_HEAD(&ls->ls_lkbtbl[i].list);
-		rwlock_init(&ls->ls_lkbtbl[i].lock);
-		ls->ls_lkbtbl[i].counter = 1;
-	}
+	idr_init(&ls->ls_lkbidr);
+	spin_lock_init(&ls->ls_lkbidr_spin);
 
 	size = dlm_config.ci_dirtbl_size;
 	ls->ls_dirtbl_size = size;
 
-	ls->ls_dirtbl = kmalloc(sizeof(struct dlm_dirtable) * size, GFP_NOFS);
+	ls->ls_dirtbl = vmalloc(sizeof(struct dlm_dirtable) * size);
 	if (!ls->ls_dirtbl)
 		goto out_lkbfree;
 	for (i = 0; i < size; i++) {
@@ -502,6 +483,9 @@ static int new_lockspace(const char *name, int namelen, void **lockspace,
 	INIT_LIST_HEAD(&ls->ls_timeout);
 	mutex_init(&ls->ls_timeout_mutex);
 
+	INIT_LIST_HEAD(&ls->ls_new_rsb);
+	spin_lock_init(&ls->ls_new_rsb_spin);
+
 	INIT_LIST_HEAD(&ls->ls_nodes);
 	INIT_LIST_HEAD(&ls->ls_nodes_gone);
 	ls->ls_num_nodes = 0;
@@ -520,6 +504,9 @@ static int new_lockspace(const char *name, int namelen, void **lockspace,
 	init_completion(&ls->ls_members_done);
 	ls->ls_members_result = -1;
 
+	mutex_init(&ls->ls_cb_mutex);
+	INIT_LIST_HEAD(&ls->ls_cb_delay);
+
 	ls->ls_recoverd_task = NULL;
 	mutex_init(&ls->ls_recoverd_active);
 	spin_lock_init(&ls->ls_recover_lock);
@@ -553,18 +540,26 @@ static int new_lockspace(const char *name, int namelen, void **lockspace,
 	list_add(&ls->ls_list, &lslist);
 	spin_unlock(&lslist_lock);
 
+	if (flags & DLM_LSFL_FS) {
+		error = dlm_callback_start(ls);
+		if (error) {
+			log_error(ls, "can't start dlm_callback %d", error);
+			goto out_delist;
+		}
+	}
+
 	/* needs to find ls in lslist */
 	error = dlm_recoverd_start(ls);
 	if (error) {
 		log_error(ls, "can't start dlm_recoverd %d", error);
-		goto out_delist;
+		goto out_callback;
 	}
 
 	ls->ls_kobj.kset = dlm_kset;
 	error = kobject_init_and_add(&ls->ls_kobj, &dlm_ktype, NULL,
 				     "%s", ls->ls_name);
 	if (error)
-		goto out_stop;
+		goto out_recoverd;
 	kobject_uevent(&ls->ls_kobj, KOBJ_ADD);
 
 	/* let kobject handle freeing of ls if there's an error */
@@ -578,7 +573,7 @@ static int new_lockspace(const char *name, int namelen, void **lockspace,
 
 	error = do_uevent(ls, 1);
 	if (error)
-		goto out_stop;
+		goto out_recoverd;
 
 	wait_for_completion(&ls->ls_members_done);
 	error = ls->ls_members_result;
@@ -595,19 +590,20 @@ static int new_lockspace(const char *name, int namelen, void **lockspace,
 	do_uevent(ls, 0);
 	dlm_clear_members(ls);
 	kfree(ls->ls_node_array);
- out_stop:
+ out_recoverd:
 	dlm_recoverd_stop(ls);
+ out_callback:
+	dlm_callback_stop(ls);
  out_delist:
 	spin_lock(&lslist_lock);
 	list_del(&ls->ls_list);
 	spin_unlock(&lslist_lock);
 	kfree(ls->ls_recover_buf);
  out_dirfree:
-	kfree(ls->ls_dirtbl);
+	vfree(ls->ls_dirtbl);
  out_lkbfree:
-	kfree(ls->ls_lkbtbl);
- out_rsbfree:
-	kfree(ls->ls_rsbtbl);
+	idr_destroy(&ls->ls_lkbidr);
+	vfree(ls->ls_rsbtbl);
  out_lsfree:
 	if (do_unreg)
 		kobject_put(&ls->ls_kobj);
@@ -641,50 +637,64 @@ int dlm_new_lockspace(const char *name, int namelen, void **lockspace,
 	return error;
 }
 
-/* Return 1 if the lockspace still has active remote locks,
- *        2 if the lockspace still has active local locks.
- */
-static int lockspace_busy(struct dlm_ls *ls)
-{
-	int i, lkb_found = 0;
-	struct dlm_lkb *lkb;
-
-	/* NOTE: We check the lockidtbl here rather than the resource table.
-	   This is because there may be LKBs queued as ASTs that have been
-	   unlinked from their RSBs and are pending deletion once the AST has
-	   been delivered */
-
-	for (i = 0; i < ls->ls_lkbtbl_size; i++) {
-		read_lock(&ls->ls_lkbtbl[i].lock);
-		if (!list_empty(&ls->ls_lkbtbl[i].list)) {
-			lkb_found = 1;
-			list_for_each_entry(lkb, &ls->ls_lkbtbl[i].list,
-					    lkb_idtbl_list) {
-				if (!lkb->lkb_nodeid) {
-					read_unlock(&ls->ls_lkbtbl[i].lock);
-					return 2;
-				}
-			}
-		}
-		read_unlock(&ls->ls_lkbtbl[i].lock);
+static int lkb_idr_is_local(int id, void *p, void *data)
+{
+	struct dlm_lkb *lkb = p;
+
+	if (!lkb->lkb_nodeid)
+		return 1;
+	return 0;
+}
+
+static int lkb_idr_is_any(int id, void *p, void *data)
+{
+	return 1;
+}
+
+static int lkb_idr_free(int id, void *p, void *data)
+{
+	struct dlm_lkb *lkb = p;
+
+	if (lkb->lkb_lvbptr && lkb->lkb_flags & DLM_IFL_MSTCPY)
+		dlm_free_lvb(lkb->lkb_lvbptr);
+
+	dlm_free_lkb(lkb);
+	return 0;
+}
+
+/* NOTE: We check the lkbidr here rather than the resource table.
+   This is because there may be LKBs queued as ASTs that have been unlinked
+   from their RSBs and are pending deletion once the AST has been delivered */
+
+static int lockspace_busy(struct dlm_ls *ls, int force)
+{
+	int rv;
+
+	spin_lock(&ls->ls_lkbidr_spin);
+	if (force == 0) {
+		rv = idr_for_each(&ls->ls_lkbidr, lkb_idr_is_any, ls);
+	} else if (force == 1) {
+		rv = idr_for_each(&ls->ls_lkbidr, lkb_idr_is_local, ls);
+	} else {
+		rv = 0;
 	}
-	return lkb_found;
+	spin_unlock(&ls->ls_lkbidr_spin);
+	return rv;
 }
 
 static int release_lockspace(struct dlm_ls *ls, int force)
 {
-	struct dlm_lkb *lkb;
 	struct dlm_rsb *rsb;
 	struct list_head *head;
 	int i, busy, rv;
 
-	busy = lockspace_busy(ls);
+	busy = lockspace_busy(ls, force);
 
 	spin_lock(&lslist_lock);
 	if (ls->ls_create_count == 1) {
-		if (busy > force)
+		if (busy) {
 			rv = -EBUSY;
-		else {
+		} else {
 			/* remove_lockspace takes ls off lslist */
 			ls->ls_create_count = 0;
 			rv = 0;
@@ -708,12 +718,12 @@ static int release_lockspace(struct dlm_ls *ls, int force)
 
 	dlm_recoverd_stop(ls);
 
+	dlm_callback_stop(ls);
+
 	remove_lockspace(ls);
 
 	dlm_delete_debug_file(ls);
 
-	dlm_astd_suspend();
-
 	kfree(ls->ls_recover_buf);
 
 	/*
@@ -721,31 +731,15 @@ static int release_lockspace(struct dlm_ls *ls, int force)
 	 */
 
 	dlm_dir_clear(ls);
-	kfree(ls->ls_dirtbl);
+	vfree(ls->ls_dirtbl);
 
 	/*
-	 * Free all lkb's on lkbtbl[] lists.
+	 * Free all lkb's in idr
 	 */
 
-	for (i = 0; i < ls->ls_lkbtbl_size; i++) {
-		head = &ls->ls_lkbtbl[i].list;
-		while (!list_empty(head)) {
-			lkb = list_entry(head->next, struct dlm_lkb,
-					 lkb_idtbl_list);
-
-			list_del(&lkb->lkb_idtbl_list);
-
-			dlm_del_ast(lkb);
-
-			if (lkb->lkb_lvbptr && lkb->lkb_flags & DLM_IFL_MSTCPY)
-				dlm_free_lvb(lkb->lkb_lvbptr);
-
-			dlm_free_lkb(lkb);
-		}
-	}
-	dlm_astd_resume();
-
-	kfree(ls->ls_lkbtbl);
+	idr_for_each(&ls->ls_lkbidr, lkb_idr_free, ls);
+	idr_remove_all(&ls->ls_lkbidr);
+	idr_destroy(&ls->ls_lkbidr);
 
 	/*
 	 * Free all rsb's on rsbtbl[] lists
@@ -770,7 +764,14 @@ static int release_lockspace(struct dlm_ls *ls, int force)
 		}
 	}
 
-	kfree(ls->ls_rsbtbl);
+	vfree(ls->ls_rsbtbl);
+
+	while (!list_empty(&ls->ls_new_rsb)) {
+		rsb = list_first_entry(&ls->ls_new_rsb, struct dlm_rsb,
+				       res_hashchain);
+		list_del(&rsb->res_hashchain);
+		dlm_free_rsb(rsb);
+	}
 
 	/*
 	 * Free structures on any other lists
diff --git a/fs/dlm/lowcomms.c b/fs/dlm/lowcomms.c
index 5e2c71f05e46..990626e7da80 100644
--- a/fs/dlm/lowcomms.c
+++ b/fs/dlm/lowcomms.c
@@ -512,12 +512,10 @@ static void process_sctp_notification(struct connection *con,
 			}
 			make_sockaddr(&prim.ssp_addr, 0, &addr_len);
 			if (dlm_addr_to_nodeid(&prim.ssp_addr, &nodeid)) {
-				int i;
 				unsigned char *b=(unsigned char *)&prim.ssp_addr;
 				log_print("reject connect from unknown addr");
-				for (i=0; i<sizeof(struct sockaddr_storage);i++)
-					printk("%02x ", b[i]);
-				printk("\n");
+				print_hex_dump_bytes("ss: ", DUMP_PREFIX_NONE, 
+						     b, sizeof(struct sockaddr_storage));
 				sctp_send_shutdown(prim.ssp_assoc_id);
 				return;
 			}
@@ -748,7 +746,10 @@ static int tcp_accept_from_sock(struct connection *con)
 	/* Get the new node's NODEID */
 	make_sockaddr(&peeraddr, 0, &len);
 	if (dlm_addr_to_nodeid(&peeraddr, &nodeid)) {
+		unsigned char *b=(unsigned char *)&peeraddr;
 		log_print("connect from non cluster node");
+		print_hex_dump_bytes("ss: ", DUMP_PREFIX_NONE, 
+				     b, sizeof(struct sockaddr_storage));
 		sock_release(newsock);
 		mutex_unlock(&con->sock_mutex);
 		return -1;
diff --git a/fs/dlm/memory.c b/fs/dlm/memory.c
index 8e0d00db004f..da64df7576e1 100644
--- a/fs/dlm/memory.c
+++ b/fs/dlm/memory.c
@@ -16,6 +16,7 @@
 #include "memory.h"
 
 static struct kmem_cache *lkb_cache;
+static struct kmem_cache *rsb_cache;
 
 
 int __init dlm_memory_init(void)
@@ -26,6 +27,14 @@ int __init dlm_memory_init(void)
 				__alignof__(struct dlm_lkb), 0, NULL);
 	if (!lkb_cache)
 		ret = -ENOMEM;
+
+	rsb_cache = kmem_cache_create("dlm_rsb", sizeof(struct dlm_rsb),
+				__alignof__(struct dlm_rsb), 0, NULL);
+	if (!rsb_cache) {
+		kmem_cache_destroy(lkb_cache);
+		ret = -ENOMEM;
+	}
+
 	return ret;
 }
 
@@ -33,6 +42,8 @@ void dlm_memory_exit(void)
 {
 	if (lkb_cache)
 		kmem_cache_destroy(lkb_cache);
+	if (rsb_cache)
+		kmem_cache_destroy(rsb_cache);
 }
 
 char *dlm_allocate_lvb(struct dlm_ls *ls)
@@ -48,16 +59,11 @@ void dlm_free_lvb(char *p)
 	kfree(p);
 }
 
-/* FIXME: have some minimal space built-in to rsb for the name and
-   kmalloc a separate name if needed, like dentries are done */
-
-struct dlm_rsb *dlm_allocate_rsb(struct dlm_ls *ls, int namelen)
+struct dlm_rsb *dlm_allocate_rsb(struct dlm_ls *ls)
 {
 	struct dlm_rsb *r;
 
-	DLM_ASSERT(namelen <= DLM_RESNAME_MAXLEN,);
-
-	r = kzalloc(sizeof(*r) + namelen, GFP_NOFS);
+	r = kmem_cache_zalloc(rsb_cache, GFP_NOFS);
 	return r;
 }
 
@@ -65,7 +71,7 @@ void dlm_free_rsb(struct dlm_rsb *r)
 {
 	if (r->res_lvbptr)
 		dlm_free_lvb(r->res_lvbptr);
-	kfree(r);
+	kmem_cache_free(rsb_cache, r);
 }
 
 struct dlm_lkb *dlm_allocate_lkb(struct dlm_ls *ls)
diff --git a/fs/dlm/memory.h b/fs/dlm/memory.h
index 485fb29143bd..177c11cbb0a6 100644
--- a/fs/dlm/memory.h
+++ b/fs/dlm/memory.h
@@ -16,7 +16,7 @@
 
 int dlm_memory_init(void);
 void dlm_memory_exit(void);
-struct dlm_rsb *dlm_allocate_rsb(struct dlm_ls *ls, int namelen);
+struct dlm_rsb *dlm_allocate_rsb(struct dlm_ls *ls);
 void dlm_free_rsb(struct dlm_rsb *r);
 struct dlm_lkb *dlm_allocate_lkb(struct dlm_ls *ls);
 void dlm_free_lkb(struct dlm_lkb *l);
diff --git a/fs/dlm/recoverd.c b/fs/dlm/recoverd.c
index fd677c8c3d3b..774da3cf92c6 100644
--- a/fs/dlm/recoverd.c
+++ b/fs/dlm/recoverd.c
@@ -58,13 +58,7 @@ static int ls_recover(struct dlm_ls *ls, struct dlm_recover *rv)
 
 	mutex_lock(&ls->ls_recoverd_active);
 
-	/*
-	 * Suspending and resuming dlm_astd ensures that no lkb's from this ls
-	 * will be processed by dlm_astd during recovery.
-	 */
-
-	dlm_astd_suspend();
-	dlm_astd_resume();
+	dlm_callback_suspend(ls);
 
 	/*
 	 * Free non-master tossed rsb's.  Master rsb's are kept on toss
@@ -202,6 +196,8 @@ static int ls_recover(struct dlm_ls *ls, struct dlm_recover *rv)
 
 	dlm_adjust_timeouts(ls);
 
+	dlm_callback_resume(ls);
+
 	error = enable_locking(ls, rv->seq);
 	if (error) {
 		log_debug(ls, "enable_locking failed %d", error);
@@ -222,8 +218,6 @@ static int ls_recover(struct dlm_ls *ls, struct dlm_recover *rv)
 
 	dlm_grant_after_purge(ls);
 
-	dlm_astd_wake();
-
 	log_debug(ls, "recover %llx done: %u ms",
 		  (unsigned long long)rv->seq,
 		  jiffies_to_msecs(jiffies - start));
diff --git a/fs/dlm/user.c b/fs/dlm/user.c
index e96bf3e9be88..d8ea60756403 100644
--- a/fs/dlm/user.c
+++ b/fs/dlm/user.c
@@ -213,9 +213,9 @@ void dlm_user_add_ast(struct dlm_lkb *lkb, uint32_t flags, int mode,
 		goto out;
 	}
 
-	if (list_empty(&lkb->lkb_astqueue)) {
+	if (list_empty(&lkb->lkb_cb_list)) {
 		kref_get(&lkb->lkb_ref);
-		list_add_tail(&lkb->lkb_astqueue, &proc->asts);
+		list_add_tail(&lkb->lkb_cb_list, &proc->asts);
 		wake_up_interruptible(&proc->wait);
 	}
 	spin_unlock(&proc->asts_spin);
@@ -832,24 +832,24 @@ static ssize_t device_read(struct file *file, char __user *buf, size_t count,
 	}
 
 	/* if we empty lkb_callbacks, we don't want to unlock the spinlock
-	   without removing lkb_astqueue; so empty lkb_astqueue is always
+	   without removing lkb_cb_list; so empty lkb_cb_list is always
 	   consistent with empty lkb_callbacks */
 
-	lkb = list_entry(proc->asts.next, struct dlm_lkb, lkb_astqueue);
+	lkb = list_entry(proc->asts.next, struct dlm_lkb, lkb_cb_list);
 
 	rv = dlm_rem_lkb_callback(lkb->lkb_resource->res_ls, lkb, &cb, &resid);
 	if (rv < 0) {
 		/* this shouldn't happen; lkb should have been removed from
 		   list when resid was zero */
 		log_print("dlm_rem_lkb_callback empty %x", lkb->lkb_id);
-		list_del_init(&lkb->lkb_astqueue);
+		list_del_init(&lkb->lkb_cb_list);
 		spin_unlock(&proc->asts_spin);
 		/* removes ref for proc->asts, may cause lkb to be freed */
 		dlm_put_lkb(lkb);
 		goto try_another;
 	}
 	if (!resid)
-		list_del_init(&lkb->lkb_astqueue);
+		list_del_init(&lkb->lkb_cb_list);
 	spin_unlock(&proc->asts_spin);
 
 	if (cb.flags & DLM_CB_SKIP) {