- Implement selwakeuppri() which allows raising the priority of a

  thread being waken up.  The thread waken up can run at a priority as
  high as after tsleep().

- Replace selwakeup()s with selwakeuppri()s and pass appropriate
  priorities.

- Add cv_broadcastpri() which raises the priority of the broadcast
  threads.  Used by selwakeuppri() if collision occurs.

Not objected in:	-arch, -current

1 files changed, 2 insertions, 2 deletions

diff --git a/sys/kern/vfs_subr.c b/sys/kern/vfs_subr.c
index dc9934b..8a49c13 100644
--- a/sys/kern/vfs_subr.c
+++ b/sys/kern/vfs_subr.c
@@ -3375,7 +3375,7 @@ vn_pollevent(vp, events)
 		 */
 		vp->v_pollinfo->vpi_events = 0;	/* &= ~events ??? */
 		vp->v_pollinfo->vpi_revents |= events;
-		selwakeup(&vp->v_pollinfo->vpi_selinfo);
+		selwakeuppri(&vp->v_pollinfo->vpi_selinfo, PRIBIO);
 	}
 	mtx_unlock(&vp->v_pollinfo->vpi_lock);
 }
@@ -3394,7 +3394,7 @@ vn_pollgone(vp)
 	VN_KNOTE(vp, NOTE_REVOKE);
 	if (vp->v_pollinfo->vpi_events) {
 		vp->v_pollinfo->vpi_events = 0;
-		selwakeup(&vp->v_pollinfo->vpi_selinfo);
+		selwakeuppri(&vp->v_pollinfo->vpi_selinfo, PRIBIO);
 	}
 	mtx_unlock(&vp->v_pollinfo->vpi_lock);
 }