Wake up swapper process if needed.

PR: kern/78474
Submitted by: Sam Lawrance <boris at brooknet dot com dot au>

1 files changed, 9 insertions, 0 deletions

diff --git a/sys/kern/kern_exit.c b/sys/kern/kern_exit.c
index d7ff969..8fb5d49 100644
--- a/sys/kern/kern_exit.c
+++ b/sys/kern/kern_exit.c
@@ -503,6 +503,15 @@ retry:
 	critical_enter();
 	mtx_unlock_spin(&sched_lock);
 	wakeup(p->p_pptr);
+	/*
+	 * XXX hack, swap in parent process, please see TDP_WAKEPROC0
+	 * code, because TDP_WAKEPROC0 is only useful if thread is
+	 * leaving critical region, but here we never leave and
+	 * thread_exit() will call cpu_throw(), TDP_WAKEPROC0 is never
+	 * cleared.
+	 */
+	if (p->p_pptr->p_sflag & PS_SWAPINREQ)
+		wakeup(&proc0);
 	PROC_UNLOCK(p->p_pptr);
 	mtx_lock_spin(&sched_lock);
 	critical_exit();