Change timer implementation to allow variable 'slop' in how late

timers are fired. The default continues to be 50us, but this can be
configured on Xen's command line.

Signed-off-by: Yu Ke <ke.yu@intel.com>
Signed-off-by: Wei Gang <gang.wei@intel.com>
Signed-off-by: Keir Fraser <keir.fraser@citrix.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/xen/include/xen/timer.h b/xen/include/xen/timer.h
index 6d4c0fc4fb..f3d2705d82 100644
--- a/xen/include/xen/timer.h
+++ b/xen/include/xen/timer.h
@@ -15,12 +15,13 @@
 struct timer {
     /* System time expiry value (nanoseconds since boot). */
     s_time_t expires;
+    s_time_t expires_end;
 
     /* Position in active-timer data structure. */
     union {
         /* Timer-heap offset. */
         unsigned int heap_offset;
-        /* Overflow linked list. */
+        /* Linked list. */
         struct timer *list_next;
     };