[src/trunk]: src/sys/uvm Disable ubc_direct by default again. There are stil...

[thorpej <thorpej%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/ad6e5d95e14d
branches:  trunk
changeset: 1009553:ad6e5d95e14d
user:      thorpej <thorpej%NetBSD.org@localhost>
date:      Sun Apr 26 16:16:13 2020 +0000

description:
Disable ubc_direct by default again.  There are still stability issues
(e.g. panic during 2020.04.25.00.07.27 amd64 releng test run).

diffstat:

 sys/uvm/uvm_bio.c |  7 ++++---
 1 files changed, 4 insertions(+), 3 deletions(-)

diffs (28 lines):

diff -r 4d2ec1313541 -r ad6e5d95e14d sys/uvm/uvm_bio.c
--- a/sys/uvm/uvm_bio.c Sun Apr 26 16:14:14 2020 +0000
+++ b/sys/uvm/uvm_bio.c Sun Apr 26 16:16:13 2020 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: uvm_bio.c,v 1.112 2020/04/24 19:47:03 ad Exp $ */
+/*     $NetBSD: uvm_bio.c,v 1.113 2020/04/26 16:16:13 thorpej Exp $    */
 
 /*
  * Copyright (c) 1998 Chuck Silvers.
@@ -34,7 +34,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: uvm_bio.c,v 1.112 2020/04/24 19:47:03 ad Exp $");
+__KERNEL_RCSID(0, "$NetBSD: uvm_bio.c,v 1.113 2020/04/26 16:16:13 thorpej Exp $");
 
 #include "opt_uvmhist.h"
 #include "opt_ubc.h"
@@ -64,7 +64,8 @@
                          int, int);
 static void __noinline ubc_zerorange_direct(struct uvm_object *, off_t, size_t, int);
 
-bool ubc_direct = true;
+/* XXX disabled by default until the kinks are worked out. */
+bool ubc_direct = false;
 #endif
 
 /*