X-Git-Url: http://git.lttng.org/?a=blobdiff_plain;f=README;h=72d92706a95505ba687177e415d84c3e1edd2d5a;hb=88c66efb5a534828dbb2a4128339e3491758de49;hp=33038af3ab12c0cc96aacbedf3cf6e76ea2fd5f7;hpb=aac98a5504a989c227bb9290f2849abc9458811c;p=urcu.git

diff --git a/README b/README
index 33038af..72d9270 100644
--- a/README
+++ b/README
@@ -189,11 +189,12 @@ Being careful with signals
 	signal(7). The liburcu-mb and liburcu-qsbr versions of the Userspace RCU
 	library do not require any signal.
 
-	Read-side critical sections are allowed in a signal handler with
-	liburcu and liburcu-mb. Be careful, however, to disable these signals
+	Read-side critical sections are allowed in a signal handler,
+	except those setup with sigaltstack(2), with liburcu and
+	liburcu-mb. Be careful, however, to disable these signals
 	between thread creation and calls to rcu_register_thread(), because a
-	signal handler nesting on an unregistered thread would not be allowed to
-	call rcu_read_lock().
+	signal handler nesting on an unregistered thread would not be
+	allowed to call rcu_read_lock().
 
 	Read-side critical sections are _not_ allowed in a signal handler with
 	liburcu-qsbr, unless signals are disabled explicitly around each
@@ -259,3 +260,10 @@ Interaction with fork()
 	call_rcu_after_fork_parent() after the fork().  The child
 	process must invoke call_rcu_after_fork_child().
 	These three APIs are suitable for passing to pthread_atfork().
+
+Thread Local Storage (TLS)
+
+	Userspace RCU can fall back on pthread_getspecific() to emulate
+	TLS variables on systems where it is not available. This behavior
+	can be forced by specifying --disable-compiler-tls as configure
+	argument.