X-Git-Url: https://git.camperquake.de/gitweb.cgi?a=blobdiff_plain;f=module%2Fzfs%2Fspa_misc.c;h=8150ac937e962292962725cd417a568619fdefad;hb=45d1cae3b8c949ecc391dd7a5b81963b34c71c29;hp=485e83fcea00bbe61bd13fdfecdd7a13bf306d12;hpb=fb5f0bc83330c8a0236c4d34a23723ac1974971a;p=zfs.git

diff --git a/module/zfs/spa_misc.c b/module/zfs/spa_misc.c
index 485e83f..8150ac9 100644
--- a/module/zfs/spa_misc.c
+++ b/module/zfs/spa_misc.c
@@ -19,7 +19,7 @@
  * CDDL HEADER END
  */
 /*
- * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
+ * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
  */
 
@@ -310,8 +310,12 @@ spa_config_tryenter(spa_t *spa, int locks, void *tag, krw_t rw)
 void
 spa_config_enter(spa_t *spa, int locks, void *tag, krw_t rw)
 {
+	int wlocks_held = 0;
+
 	for (int i = 0; i < SCL_LOCKS; i++) {
 		spa_config_lock_t *scl = &spa->spa_config_lock[i];
+		if (scl->scl_writer == curthread)
+			wlocks_held |= (1 << i);
 		if (!(locks & (1 << i)))
 			continue;
 		mutex_enter(&scl->scl_lock);
@@ -331,6 +335,7 @@ spa_config_enter(spa_t *spa, int locks, void *tag, krw_t rw)
 		(void) refcount_add(&scl->scl_count, tag);
 		mutex_exit(&scl->scl_lock);
 	}
+	ASSERT(wlocks_held <= locks);
 }
 
 void
@@ -425,7 +430,6 @@ spa_add(const char *name, const char *altroot)
 	spa = kmem_zalloc(sizeof (spa_t), KM_SLEEP);
 
 	mutex_init(&spa->spa_async_lock, NULL, MUTEX_DEFAULT, NULL);
-	mutex_init(&spa->spa_async_root_lock, NULL, MUTEX_DEFAULT, NULL);
 	mutex_init(&spa->spa_scrub_lock, NULL, MUTEX_DEFAULT, NULL);
 	mutex_init(&spa->spa_errlog_lock, NULL, MUTEX_DEFAULT, NULL);
 	mutex_init(&spa->spa_errlist_lock, NULL, MUTEX_DEFAULT, NULL);
@@ -434,7 +438,6 @@ spa_add(const char *name, const char *altroot)
 	mutex_init(&spa->spa_props_lock, NULL, MUTEX_DEFAULT, NULL);
 
 	cv_init(&spa->spa_async_cv, NULL, CV_DEFAULT, NULL);
-	cv_init(&spa->spa_async_root_cv, NULL, CV_DEFAULT, NULL);
 	cv_init(&spa->spa_scrub_io_cv, NULL, CV_DEFAULT, NULL);
 	cv_init(&spa->spa_suspend_cv, NULL, CV_DEFAULT, NULL);
 
@@ -508,12 +511,10 @@ spa_remove(spa_t *spa)
 	spa_config_lock_destroy(spa);
 
 	cv_destroy(&spa->spa_async_cv);
-	cv_destroy(&spa->spa_async_root_cv);
 	cv_destroy(&spa->spa_scrub_io_cv);
 	cv_destroy(&spa->spa_suspend_cv);
 
 	mutex_destroy(&spa->spa_async_lock);
-	mutex_destroy(&spa->spa_async_root_lock);
 	mutex_destroy(&spa->spa_scrub_lock);
 	mutex_destroy(&spa->spa_errlog_lock);
 	mutex_destroy(&spa->spa_errlist_lock);