OS-6363 system went to dark side of moon for ~467 seconds OS-6404 ARC reclaim should throttle its calls to arc_kmem_reap_now() Reviewed by: Bryan Cantrill <bryan@joyent.com> Reviewed by: Dan McDonald <danmcd@joyent.com>

@@ -20,11 +20,11 @@
  */
 /*
  * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
  * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
  * Copyright (c) 2012, 2016 by Delphix. All rights reserved.
- * Copyright (c) 2012, Joyent, Inc. All rights reserved.
+ * Copyright (c) 2017, Joyent, Inc. All rights reserved.
  */
 
 #ifndef _SYS_ZFS_CONTEXT_H
 #define _SYS_ZFS_CONTEXT_H
 

@@ -331,11 +331,12 @@
         umem_cache_create(_a, _b, _c, _d, _e, _f, _g, _h, _i)
 #define kmem_cache_destroy(_c)  umem_cache_destroy(_c)
 #define kmem_cache_alloc(_c, _f) umem_cache_alloc(_c, _f)
 #define kmem_cache_free(_c, _b) umem_cache_free(_c, _b)
 #define kmem_debugging()        0
-#define kmem_cache_reap_now(_c)         /* nothing */
+#define kmem_cache_reap_active()        (B_FALSE)
+#define kmem_cache_reap_soon(_c)        /* nothing */
 #define kmem_cache_set_move(_c, _cb)    /* nothing */
 #define vmem_qcache_reap(_v)            /* nothing */
 #define POINTER_INVALIDATE(_pp)         /* nothing */
 #define POINTER_IS_VALID(_p)    0
 

@@ -389,10 +390,11 @@
             (taskq_create(a, b, maxclsyspri, d, e, f))
 extern taskqid_t taskq_dispatch(taskq_t *, task_func_t, void *, uint_t);
 extern void     taskq_dispatch_ent(taskq_t *, task_func_t, void *, uint_t,
     taskq_ent_t *);
 extern void     taskq_destroy(taskq_t *);
+extern boolean_t taskq_empty(taskq_t *);
 extern void     taskq_wait(taskq_t *);
 extern int      taskq_member(taskq_t *, void *);
 extern void     system_taskq_init(void);
 extern void     system_taskq_fini(void);