1 files changed, 11 insertions, 1 deletions
diff --git a/cddl/contrib/opensolaris/lib/libzpool/common/sys/zfs_context.h b/cddl/contrib/opensolaris/lib/libzpool/common/sys/zfs_context.h
index 493be33..15ad5ed 100644
--- a/cddl/contrib/opensolaris/lib/libzpool/common/sys/zfs_context.h
+++ b/cddl/contrib/opensolaris/lib/libzpool/common/sys/zfs_context.h
@@ -135,8 +135,18 @@ extern int aok;
 
 /*
  * DTrace SDT probes have different signatures in userland than they do in
- * kernel.  If they're being used in kernel code, re-define them out of
+ * the kernel.  If they're being used in kernel code, re-define them out of
  * existence for their counterparts in libzpool.
+ *
+ * Here's an example of how to use the set-error probes in userland:
+ * zfs$target:::set-error /arg0 == EBUSY/ {stack();}
+ *
+ * Here's an example of how to use DTRACE_PROBE probes in userland:
+ * If there is a probe declared as follows:
+ * DTRACE_PROBE2(zfs__probe_name, uint64_t, blkid, dnode_t *, dn);
+ * Then you can use it as follows:
+ * zfs$target:::probe2 /copyinstr(arg0) == "zfs__probe_name"/
+ *     {printf("%u %p\n", arg1, arg2);}
  */
 
 #ifdef DTRACE_PROBE