Print this page 
5269 zfs: zpool import slow
PORTING: this code relies on the property of taskq_wait to wait
until no more tasks are queued and no more tasks are active. As
we always queue new tasks from within other tasks, task_wait
reliably waits for the full recursion to finish, even though we
enqueue new tasks after taskq_wait has been called.
On platforms other than illumos, taskq_wait may not have this
property.
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: Dan McDonald <danmcd@omniti.com>
Reviewed by: George Wilson <george.wilson@delphix.com>


 125         sa_os_t *os_sa;
 126 };
 127 
 128 #define DMU_META_OBJSET         0
 129 #define DMU_META_DNODE_OBJECT   0
 130 #define DMU_OBJECT_IS_SPECIAL(obj) ((int64_t)(obj) <= 0)
 131 #define DMU_META_DNODE(os)      ((os)->os_meta_dnode.dnh_dnode)
 132 #define DMU_USERUSED_DNODE(os)  ((os)->os_userused_dnode.dnh_dnode)
 133 #define DMU_GROUPUSED_DNODE(os) ((os)->os_groupused_dnode.dnh_dnode)
 134 
 135 #define DMU_OS_IS_L2CACHEABLE(os)                               \
 136         ((os)->os_secondary_cache == ZFS_CACHE_ALL ||                \
 137         (os)->os_secondary_cache == ZFS_CACHE_METADATA)
 138 
 139 #define DMU_OS_IS_L2COMPRESSIBLE(os)    (zfs_mdcomp_disable == B_FALSE)
 140 
 141 /* called from zpl */
 142 int dmu_objset_hold(const char *name, void *tag, objset_t **osp);
 143 int dmu_objset_own(const char *name, dmu_objset_type_t type,
 144     boolean_t readonly, void *tag, objset_t **osp);


 145 void dmu_objset_refresh_ownership(objset_t *os, void *tag);
 146 void dmu_objset_rele(objset_t *os, void *tag);
 147 void dmu_objset_disown(objset_t *os, void *tag);
 148 int dmu_objset_from_ds(struct dsl_dataset *ds, objset_t **osp);
 149 
 150 void dmu_objset_stats(objset_t *os, nvlist_t *nv);
 151 void dmu_objset_fast_stat(objset_t *os, dmu_objset_stats_t *stat);
 152 void dmu_objset_space(objset_t *os, uint64_t *refdbytesp, uint64_t *availbytesp,
 153     uint64_t *usedobjsp, uint64_t *availobjsp);
 154 uint64_t dmu_objset_fsid_guid(objset_t *os);
 155 int dmu_objset_find_dp(struct dsl_pool *dp, uint64_t ddobj,
 156     int func(struct dsl_pool *, struct dsl_dataset *, void *),
 157     void *arg, int flags);
 158 int dmu_objset_prefetch(const char *name, void *arg);
 159 void dmu_objset_evict_dbufs(objset_t *os);
 160 timestruc_t dmu_objset_snap_cmtime(objset_t *os);
 161 
 162 /* called from dsl */
 163 void dmu_objset_sync(objset_t *os, zio_t *zio, dmu_tx_t *tx);
 164 boolean_t dmu_objset_is_dirty(objset_t *os, uint64_t txg);




 125         sa_os_t *os_sa;
 126 };
 127 
 128 #define DMU_META_OBJSET         0
 129 #define DMU_META_DNODE_OBJECT   0
 130 #define DMU_OBJECT_IS_SPECIAL(obj) ((int64_t)(obj) <= 0)
 131 #define DMU_META_DNODE(os)      ((os)->os_meta_dnode.dnh_dnode)
 132 #define DMU_USERUSED_DNODE(os)  ((os)->os_userused_dnode.dnh_dnode)
 133 #define DMU_GROUPUSED_DNODE(os) ((os)->os_groupused_dnode.dnh_dnode)
 134 
 135 #define DMU_OS_IS_L2CACHEABLE(os)                               \
 136         ((os)->os_secondary_cache == ZFS_CACHE_ALL ||                \
 137         (os)->os_secondary_cache == ZFS_CACHE_METADATA)
 138 
 139 #define DMU_OS_IS_L2COMPRESSIBLE(os)    (zfs_mdcomp_disable == B_FALSE)
 140 
 141 /* called from zpl */
 142 int dmu_objset_hold(const char *name, void *tag, objset_t **osp);
 143 int dmu_objset_own(const char *name, dmu_objset_type_t type,
 144     boolean_t readonly, void *tag, objset_t **osp);
 145 int dmu_objset_own_obj(struct dsl_pool *dp, uint64_t obj,
 146     dmu_objset_type_t type, boolean_t readonly, void *tag, objset_t **osp);
 147 void dmu_objset_refresh_ownership(objset_t *os, void *tag);
 148 void dmu_objset_rele(objset_t *os, void *tag);
 149 void dmu_objset_disown(objset_t *os, void *tag);
 150 int dmu_objset_from_ds(struct dsl_dataset *ds, objset_t **osp);
 151 
 152 void dmu_objset_stats(objset_t *os, nvlist_t *nv);
 153 void dmu_objset_fast_stat(objset_t *os, dmu_objset_stats_t *stat);
 154 void dmu_objset_space(objset_t *os, uint64_t *refdbytesp, uint64_t *availbytesp,
 155     uint64_t *usedobjsp, uint64_t *availobjsp);
 156 uint64_t dmu_objset_fsid_guid(objset_t *os);
 157 int dmu_objset_find_dp(struct dsl_pool *dp, uint64_t ddobj,
 158     int func(struct dsl_pool *, struct dsl_dataset *, void *),
 159     void *arg, int flags);
 160 int dmu_objset_prefetch(const char *name, void *arg);
 161 void dmu_objset_evict_dbufs(objset_t *os);
 162 timestruc_t dmu_objset_snap_cmtime(objset_t *os);
 163 
 164 /* called from dsl */
 165 void dmu_objset_sync(objset_t *os, zio_t *zio, dmu_tx_t *tx);
 166 boolean_t dmu_objset_is_dirty(objset_t *os, uint64_t txg);