5056 ZFS deadlock on db_mtx and dn_holds
Reviewed by: Will Andrews <willa@spectralogic.com>
Reviewed by: Matt Ahrens <mahrens@delphix.com>
Reviewed by: George Wilson <george.wilson@delphix.com>
Approved by: Dan McDonald <danmcd@omniti.com>

@@ -20,10 +20,11 @@
  */
 /*
  * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
  * Copyright (c) 2011, 2014 by Delphix. All rights reserved.
  * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
+ * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved.
  */
 
 #ifndef _SYS_SPA_H
 #define _SYS_SPA_H
 

@@ -680,10 +681,11 @@
 extern spa_t *spa_next(spa_t *prev);
 
 /* Refcount functions */
 extern void spa_open_ref(spa_t *spa, void *tag);
 extern void spa_close(spa_t *spa, void *tag);
+extern void spa_async_close(spa_t *spa, void *tag);
 extern boolean_t spa_refcount_zero(spa_t *spa);
 
 #define SCL_NONE        0x00
 #define SCL_CONFIG      0x01
 #define SCL_STATE       0x02

@@ -752,10 +754,13 @@
 extern void spa_update_dspace(spa_t *spa);
 extern uint64_t spa_version(spa_t *spa);
 extern boolean_t spa_deflate(spa_t *spa);
 extern metaslab_class_t *spa_normal_class(spa_t *spa);
 extern metaslab_class_t *spa_log_class(spa_t *spa);
+extern void spa_evicting_os_register(spa_t *, objset_t *os);
+extern void spa_evicting_os_deregister(spa_t *, objset_t *os);
+extern void spa_evicting_os_wait(spa_t *spa);
 extern int spa_max_replication(spa_t *spa);
 extern int spa_prev_software_version(spa_t *spa);
 extern int spa_busy(void);
 extern uint8_t spa_get_failmode(spa_t *spa);
 extern boolean_t spa_suspended(spa_t *spa);