[src/trunk]: src/sys/uvm add sysctl to easily set ubc_direct

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

details:   https://anonhg.NetBSD.org/src/rev/1fc7ed752d29
branches:  trunk
changeset: 995844:1fc7ed752d29
user:      jdolecek <jdolecek%NetBSD.org@localhost>
date:      Mon Jan 07 22:48:01 2019 +0000

description:
add sysctl to easily set ubc_direct

PR kern/53124

diffstat:

 sys/uvm/uvm_meter.c |  12 ++++++++++--
 sys/uvm/uvm_page.h  |   3 ++-
 2 files changed, 12 insertions(+), 3 deletions(-)

diffs (50 lines):

diff -r d8434ab5e345 -r 1fc7ed752d29 sys/uvm/uvm_meter.c
--- a/sys/uvm/uvm_meter.c       Mon Jan 07 22:35:55 2019 +0000
+++ b/sys/uvm/uvm_meter.c       Mon Jan 07 22:48:01 2019 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: uvm_meter.c,v 1.68 2018/09/03 16:29:37 riastradh Exp $ */
+/*     $NetBSD: uvm_meter.c,v 1.69 2019/01/07 22:48:01 jdolecek Exp $  */
 
 /*
  * Copyright (c) 1997 Charles D. Cranor and Washington University.
@@ -36,7 +36,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: uvm_meter.c,v 1.68 2018/09/03 16:29:37 riastradh Exp $");
+__KERNEL_RCSID(0, "$NetBSD: uvm_meter.c,v 1.69 2019/01/07 22:48:01 jdolecek Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -295,6 +295,14 @@
                       SYSCTL_DESCR("Guard size of other threads"),
                       NULL, 0, &user_thread_stack_guard_size, 0,
                       CTL_VM, VM_THREAD_GUARD_SIZE, CTL_EOL);
+#ifdef PMAP_DIRECT
+       sysctl_createv(clog, 0, NULL, NULL,
+                      CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
+                      CTLTYPE_BOOL, "ubc_direct",
+                      SYSCTL_DESCR("Use direct map for UBC I/O"),
+                      NULL, 0, &ubc_direct, 0,
+                      CTL_VM, CTL_CREATE, CTL_EOL);
+#endif
 
        uvmpdpol_sysctlsetup();
 }
diff -r d8434ab5e345 -r 1fc7ed752d29 sys/uvm/uvm_page.h
--- a/sys/uvm/uvm_page.h        Mon Jan 07 22:35:55 2019 +0000
+++ b/sys/uvm/uvm_page.h        Mon Jan 07 22:48:01 2019 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: uvm_page.h,v 1.83 2018/05/19 15:03:26 jdolecek Exp $   */
+/*     $NetBSD: uvm_page.h,v 1.84 2019/01/07 22:48:01 jdolecek Exp $   */
 
 /*
  * Copyright (c) 1997 Charles D. Cranor and Washington University.
@@ -337,6 +337,7 @@
 paddr_t uvm_vm_page_to_phys(const struct vm_page *);
 
 #if defined(PMAP_DIRECT)
+extern bool ubc_direct;
 int uvm_direct_process(struct vm_page **, u_int, voff_t, vsize_t,
            int (*)(void *, size_t, void *), void *);
 #endif