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Illumos 6171 - dsl_prop_unregister() slows down dataset eviction.

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6171 dsl_prop_unregister() slows down dataset eviction.
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: Prakash Surya <prakash.surya@delphix.com>
Approved by: Dan McDonald <danmcd@omniti.com>

References:
  https://www.illumos.org/issues/6171
  https://github.com/illumos/illumos-gate/commit/03bad06

Porting notes:
  - Conflicts
    - 3558fd7 Prototype/structure update for Linux
    - 2cf7f52 Linux compat 2.6.39: mount_nodev()
    - 13fe019 Illumos #3464
    - 241b541 Illumos 5959 - clean up per-dataset feature count code
  - dsl_prop_unregister() preserved until out of tree consumers
    like Lustre can transition to dsl_prop_unregister_all().
  - Fixing 'space or tab at end of line' in include/sys/dsl_dataset.h

Ported-by: kernelOfTruth kerneloftruth@gmail.com
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
This commit is contained in:
Justin T. Gibbs
2015-11-05 00:00:58 +01:00
committed by Brian Behlendorf
parent 5a28a9737a
commit 0eb21616fa
8 changed files with 186 additions and 190 deletions
Download Patch File Download Diff File Expand all files Collapse all files
include/sys/dsl_prop.h
+12 -2
View File
@@ -41,10 +41,17 @@ struct dsl_dir;
/* The callback func may not call into the DMU or DSL! */
typedef void (dsl_prop_changed_cb_t)(void *arg, uint64_t newval);
typedef struct dsl_prop_record {
list_node_t pr_node; /* link on dd_props */
const char *pr_propname;
list_t pr_cbs;
} dsl_prop_record_t;
typedef struct dsl_prop_cb_record {
list_node_t cbr_node; /* link on dd_prop_cbs */
list_node_t cbr_pr_node; /* link on pr_cbs */
list_node_t cbr_ds_node; /* link on ds_prop_cbs */
dsl_prop_record_t *cbr_pr;
struct dsl_dataset *cbr_ds;
const char *cbr_propname;
dsl_prop_changed_cb_t *cbr_func;
void *cbr_arg;
} dsl_prop_cb_record_t;
@@ -54,10 +61,13 @@ typedef struct dsl_props_arg {
zprop_source_t pa_source;
} dsl_props_arg_t;
void dsl_prop_init(dsl_dir_t *dd);
void dsl_prop_fini(dsl_dir_t *dd);
int dsl_prop_register(struct dsl_dataset *ds, const char *propname,
dsl_prop_changed_cb_t *callback, void *cbarg);
int dsl_prop_unregister(struct dsl_dataset *ds, const char *propname,
dsl_prop_changed_cb_t *callback, void *cbarg);
void dsl_prop_unregister_all(struct dsl_dataset *ds, void *cbarg);
void dsl_prop_notify_all(struct dsl_dir *dd);
boolean_t dsl_prop_hascb(struct dsl_dataset *ds);