Author: mjg
Date: Mon Apr 23 07:52:56 2018
New Revision: 332880
URL: https://svnweb.freebsd.org/changeset/base/332880

Log:
  lockf: perform wakeup onlly when there is anybody waiting
  
  Tested by:      pho

Modified:
  head/sys/kern/kern_lockf.c

Modified: head/sys/kern/kern_lockf.c
==============================================================================
--- head/sys/kern/kern_lockf.c  Mon Apr 23 07:52:10 2018        (r332879)
+++ head/sys/kern/kern_lockf.c  Mon Apr 23 07:52:56 2018        (r332880)
@@ -724,10 +724,11 @@ retry_setlock:
        VI_LOCK(vp);
 
        state->ls_threads--;
-       wakeup(state);
        if (LIST_EMPTY(&state->ls_active) && state->ls_threads == 0) {
                KASSERT(LIST_EMPTY(&state->ls_pending),
                    ("freeable state with pending locks"));
+       } else {
+               wakeup(state);
        }
 
        VI_UNLOCK(vp);
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