xentrace: Ensure virq gets sent even if we exactly hit the half water mark.

Signed-off-by: Keir Fraser <keir.fraser@citrix.com>

diff --git a/xen/common/trace.c b/xen/common/trace.c
index bf1d1fe7faa06bd2f325117f1d0a8e4f3b53fff6..9af70798bb25d7223651f16ed4623e940cbab774 100644 (file)
--- a/xen/common/trace.c
+++ b/xen/common/trace.c
@@ -485,8 +485,8 @@ void __trace_var(u32 event, int cycles, int extra, unsigned char *extra_data)
     local_irq_restore(flags);
 
     /* Notify trace buffer consumer that we've crossed the high water mark. */
-    if ( started_below_highwater
-         && ((buf->prod - buf->cons) > t_buf_highwater) )
+    if ( started_below_highwater &&
+         ((buf->prod - buf->cons) >= t_buf_highwater) )
         raise_softirq(TRACE_SOFTIRQ);
 }