Index: head/sys/kern/vfs_aio.c
===================================================================
--- head/sys/kern/vfs_aio.c
+++ head/sys/kern/vfs_aio.c
@@ -1079,9 +1079,6 @@
 	aiop->aiothread = td;
 	aiop->aiothreadflags = 0;
 
-	/* The daemon resides in its own pgrp. */
-	sys_setsid(td, NULL);
-
 	/*
 	 * Wakeup parent process.  (Parent sleeps to keep from blasting away
 	 * and creating too many daemons.)