From: Matthew Dillon <dillon@apollo.backplane.com>
Date: Thu, 28 Jul 2011 23:20:33 +0000 (-0700)
Subject: kernel - remove debugging print_backtrace() when a vkernel is killed
X-Git-Tag: v2.12.0~274
X-Git-Url: http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff_plain/5fb4f156a8c394bdd558af7d5ffc80df76a43200

kernel - remove debugging print_backtrace() when a vkernel is killed

* In certain cases a debugging print_backtrace() occurs when a vkernel is
  killed while one or more of its cpu threads is active.  This can crash
  64-bit systems.

* Remove the call for now.
---

diff --git a/sys/vm/vm_vmspace.c b/sys/vm/vm_vmspace.c
index 13e0b65..d8b1854 100644
--- a/sys/vm/vm_vmspace.c
+++ b/sys/vm/vm_vmspace.c
@@ -678,7 +678,6 @@ vkernel_lwp_exit(struct lwp *lp)
 		if ((ve = vklp->ve) != NULL) {
 			kprintf("Warning, pid %d killed with "
 				"active VC!\n", lp->lwp_proc->p_pid);
-			print_backtrace(-1);
 			pmap_setlwpvm(lp, lp->lwp_proc->p_vmspace);
 			vklp->ve = NULL;
 			KKASSERT(ve->refs > 0);