X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=urcu-call-rcu-impl.h;h=dca98e4ae073d45f93d8665235b715661f16c0ad;hb=b9f893b69fbc31baea418794938f4eb74cc4923a;hp=cf65992f4e57a8bc86187744271c5ee4c58b6d26;hpb=5161f31e09ce33dd79afad8d08a2372fbf1c4fbe;p=urcu.git

diff --git a/urcu-call-rcu-impl.h b/urcu-call-rcu-impl.h
index cf65992..dca98e4 100644
--- a/urcu-call-rcu-impl.h
+++ b/urcu-call-rcu-impl.h
@@ -49,12 +49,14 @@
 struct call_rcu_data {
 	/*
 	 * Align the tail on cache line size to eliminate false-sharing
-	 * with head.
+	 * with head. Small note, however: the "qlen" field, kept for
+	 * debugging, will cause false-sharing between enqueue and
+	 * dequeue.
 	 */
-	struct cds_wfcq_tail __attribute__((aligned(CAA_CACHE_LINE_SIZE))) cbs_tail;
+	struct cds_wfcq_tail cbs_tail;
 	/* Alignment on cache line size will add padding here */
 
-	struct cds_wfcq_head cbs_head;
+	struct cds_wfcq_head __attribute__((aligned(CAA_CACHE_LINE_SIZE))) cbs_head;
 	unsigned long flags;
 	int32_t futex;
 	unsigned long qlen; /* maintained for debugging. */