X-Git-Url: https://git.liburcu.org/?p=urcu.git;a=blobdiff_plain;f=README;h=a6e29c875de973ec9020cad76de9e28aa564fdf2;hp=659511f7c46eba7260e1297ae247efceaa88b7bf;hb=fe670822b1f4f5c4fee0254792fc47f7cdd7ab8e;hpb=ef84facf4b0c23bd695ca9300055e3ffc9b56006

diff --git a/README b/README
index 659511f..a6e29c8 100644
--- a/README
+++ b/README
@@ -124,22 +124,37 @@ Writing
 
 Usage of liburcu-defer
 
-	* #include <urcu-defer.h>
-	* Link with "-lurcu-defer", and also with one of the urcu library
-	  (either urcu, urcu-bp, urcu-mb or urcu-qsbr).
+	* Follow instructions for either liburcu, liburcu-qsbr,
+	  liburcu-mb, liburcu-signal, or liburcu-bp above.
+	  The liburcu-defer functionality is pulled into each of
+	  those library modules.
 	* Provides defer_rcu() primitive to enqueue delayed callbacks. Queued
 	  callbacks are executed in batch periodically after a grace period.
 	  Do _not_ use defer_rcu() within a read-side critical section, because
 	  it may call synchronize_rcu() if the thread queue is full.
-	* Provides defer_rcu_ratelimit() primitive, which acts just like
-	  defer_rcu(), but takes an additional rate limiter callback forcing
-	  synchronized callback execution of the limiter returns non-zero.
+	  This can lead to deadlock or worse.
 	* Requires that rcu_defer_barrier() must be called in library destructor
 	  if a library queues callbacks and is expected to be unloaded with
 	  dlclose().
 	* Its API is currently experimental. It may change in future library
 	  releases.
 
+Usage of urcu-call-rcu
+
+	* Follow instructions for either liburcu, liburcu-qsbr,
+	  liburcu-mb, liburcu-signal, or liburcu-bp above.
+	  The urcu-call-rcu functionality is provided for each of
+	  these library modules.
+	* Provides the call_rcu() primitive to enqueue delayed callbacks
+	  in a manner similar to defer_rcu(), but without ever delaying
+	  for a grace period.  On the other hand, call_rcu()'s best-case
+	  overhead is not quite as good as that of defer_rcu().
+	* Provides call_rcu() to allow asynchronous handling of RCU
+	  grace periods.  A number of additional functions are provided
+	  to manage the helper threads used by call_rcu(), but reasonable
+	  defaults are used if these additional functions are not invoked.
+	  See API.txt for more details.
+
 Being careful with signals
 
 	The liburcu library uses signals internally. The signal handler is